I cringe every time I see a WU download with 3.21.157.11 listed as the CS but have only had a few hang or get dumped because the server didn't like the results. I wonder where is the "I don't like the server"  button. The clients running the newest version seem to have less issue with it but the clients on older versions seem to have better ppd. That is until I unplugged 3 of 5 rigs for maintenance and relocation. 
 
Side note, I noticed that the ending bids for auctions has risen a bit on the 10 series cards on fleabay. I was waiting to see this once we had the sudden increase in folders. Never a guarantee there of course but have seen quite a few fetch way higher than normal. I think I will be retiring my 1060's and most 1070's and maybe the 1080sc soon. Will be holding onto the 1080ti sc2 for a bit.