I had some performance problems. Suddenly, steam deck lost about 60% of its performance in games. My troubleshooting didn’t help. After that, I contacted steam support. We were talking for about a week, but nothing helped, so they agreed to send me a replacement.
I have to say… The fresh vent smells even better than I remember.
I actually had that problem a couple of days ago and was able to fix it myself by using the steam OS “main” channel instead of stable. The main channel is probably close to alpha. After that I could go back and it stayed fixed. So it seems that the new software indeed solved this problem.