your verdict sounds pretty fair and for sure motivating for the few EVGA employees left ... not.
the EVGA Bios developer that you are bothering here might just be busy doing his job, which is coding and testing bios, and not answering requests in a user forum.
he maybe could do this, but he must not.
it's done when it's done, and as it already has been stated by EVGA support, ETA is simply unknown as of now.
your moaning is useless and superfluous.

The coder shouldn't be the one providing a statement or reassurance.  Chris was was willing to provide assurance before.  What changed?  I don't think that the company has collapsed down to only one employee, yet.
 
It seems like EVGA is using its typical rag-tag team of offshore programmers to provide another solution which will probably half-work.  EVGA created the request and is waiting on the product.

There were reports the entire motherboard team at EVGA Taiwan office was laid-off, which includes probably BIOS engineers. If this is true, then they don't have engineers to provide new updated BIOSes for Z690 and Z790 platforms.  They stopped selling Z790 motherboards after Intel 14th gen was released (I think like next day).
 
These are the facts here:

• May 4th -- Beta BIOS 1.15 (Z790 DARK K|NGP|N) <-- never became final release still in BETA this was probably last release from EVGA Taiwan BIOS team.
• July 6th -- EVGATech_ChrisB: We are working on an updated BIOS to incorporate support for the next generation Intel CPUs on our Z690 and Z790 Motherboards. Once we have more information available it will be posted on our website. https://forums.evga.com/FindPost/3608958  <-- first claim they will support next gen CPUs on Z690 and Z790 motherboards
• July 7th -- There whole Taiwan offices just walked out on the job including Kingpin. https://www.techpowerup.com/310955/evga-withdraws-from-the-motherboard-market <-- whole Taiwan office quits
• August 31th -- EVGATech_ChrisB: Yes, I can confirm that we are working on it and as soon as available we will notify everyone on the forums as well.  Thank you for your patience. https://forums.evga.com/FindPost/3611921 <-- still promising new BIOS which will support 14th gen on Z690
• October 17th -- Intel releases 14th Gen to the market.
• October 18/19th -- EVGA stops selling Z790 motherboards on 3th party markets like Newegg and Amazon.

 

ilukeberry

• July 7th -- There whole Taiwan offices just walked out on the job including Kingpin. https://www.techpowerup.com/310955/evga-withdraws-from-the-motherboard-market <-- whole Taiwan office quits

Check the link you provided - it updates a bit later in the day and reports the following message from EVGA;
 
"We saw those message and they are rumors.
Our Taiwan office is still operating and Kingpin is still with EVGA.
EVGA is still doing business and supporting its customers.
Thanks for reaching out."

I think that is not true what they said.

I just saw Kingpin put this comment on his FB post about running on EVGA boards with 14900k:

This is on 690 DARK with normal room temp ambient watercooling. It's hitting 98-99c under load here on R23, so likely the max of this chip. The Ecores on these cpus seem much improved. Also, it goes without saying that you MUST USE manual settings to get it flying. Currently there still isn't any official bios support for 14th gen, so don't expect "auto" type settings to 100% function correctly on either boards. That being said, It will still OC like a beast if you tweak everything manually.

ilukeberry
There were reports the entire motherboard team at EVGA Taiwan office was laid-off, which includes probably BIOS engineers. If this is true, then they don't have engineers to provide new updated BIOSes for Z690 and Z790 platforms.  They stopped selling Z790 motherboards after Intel 14th gen was released (I think like next day).
 
These are the facts here:

• May 4th -- Beta BIOS 1.15 (Z790 DARK K|NGP|N) <-- never became final release still in BETA this was probably last release from EVGA Taiwan BIOS team.
• July 6th -- EVGATech_ChrisB: We are working on an updated BIOS to incorporate support for the next generation Intel CPUs on our Z690 and Z790 Motherboards. Once we have more information available it will be posted on our website. https://forums.evga.com/FindPost/3608958  <-- first claim they will support next gen CPUs on Z690 and Z790 motherboards
• July 7th -- There whole Taiwan offices just walked out on the job including Kingpin. https://www.techpowerup.com/310955/evga-withdraws-from-the-motherboard-market <-- whole Taiwan office quits
• August 31th -- EVGATech_ChrisB: Yes, I can confirm that we are working on it and as soon as available we will notify everyone on the forums as well.  Thank you for your patience. https://forums.evga.com/FindPost/3611921 <-- still promising new BIOS which will support 14th gen on Z690
• October 17th -- Intel releases 14th Gen to the market.
• October 18/19th -- EVGA stops selling Z790 motherboards on 3th party markets like Newegg and Amazon.

 

and i add

• June 16th -- while evga released a new power supply the other companies released updated bios for 14th gen support.
  • https://www.techpowerup.com/310180/evga-introduces-supernova-1000g-850g-xc-psu-series
  • https://www.techpowerup.com/310255/asus-asrock-motherboards-updated-with-bios-support-for-intel-14th-gen-core
  • https://wccftech.com/gigabyte-adds-next-gen-intel-desktop-cpu-support-600-700-series-motherboards/

 
 
ps: for the rest I don't think it makes sense to try to explain how a company should work to a fanboy who has most likely never worked in his life.
edit: just block him like i did, spam problem solved.

I can also add to the list of others who have confirmed 14900K working in Z790 Dark KINGPIN with 1.15 bios. Although the clock speeds are not reading correctly at all, looks like multiplier is accurate. will investigate further over the weekend.

Running not supported CPU by motherboard's BIOS is just ugly. It might work yeah, but it's half ass ugly solution, you don't really know if it will be stable in all scenarios.

So, nothing yet? What a wonderfull company...