https://www.techpowerup.com/272486/microsoft-releases-flight-simulator-patch-improving-performance-by-10
 
Microsoft have recently released Flight Simulator patch 1.8.3.0 which provides major optimizations, especially in CPU-limited scenarios. The specific improvements include; Optimized cockpit screen display when screens are not displayed on screen, New option available to control cockpit screen update frequency, Tweaked CPU thread priorities to reduce interruption of frame critical threads, Optimized loading system to reduce overall loading times, Optimized heavy airport scenes impact on CPU, Reduced the amount of GPU overdraw to improve GPU performance, Memory optimizations to reduce software memory footprint and improve performance on limited memory computers.

These improvements will provide strong performance benefits to all players especially those who are CPU constrained. Overclock 3D has tested the latest patch and have recorded improvements of 11.4% at 1080p with average framerates increasing from 79.5 FPS to 88.6 FPS on their NVIDIA RTX 2080 Ti and an AMD Ryzen 9 3950X test bench. They also noted an improvement in 1st Percentile framerates increasing from 71.3 FPS to 74.6 FPS. These performance improvements will be most notable in "heavy airport scenes" where Microsoft has focused their optimization efforts.
 
A very good effort from Microsoft to provide better performance. 

But no helicopters,
But wait, ya can have it all for the low monthly fee subscription, but wait again, and we'll add-on the DLC for free with the Gold package monthly upgraded subscription your already paying for, ontop of the core game you already bought.
 
Welcome, to the way Corporate America works these dayz. Makes ya miss 2008 doesnt it?....

Well as long as you have the xbox account and of course the monthly fee,  yes ahh for 2008 when you bought the whole package with acceleration and had everything. I guess buying all the planes and airports won't be so bad.  Beats just flying in Hawaii with a couple of standard planes.  Oh yea and its in real time with Bing. Make sure you have the 150gig drive space and I believe you have to have a certain speed connection too.