For what it's worth I was experiencing crashes on Patch 5. No crashes on the recently released Patch 6 and the performance is better as well. As a Steam Deck gamer, I appreciated Larian adding FSR support as well. It's not an exaggeration to say that people who start playing now are getting a substantially smoother experience than those who played on Day 1.
The game launched yesterday on Xbox and those folks are going to have a blast. :)