I played Kingdom Hearts III at 40fps on my Steam Deck because stable 60 was not possible (and even if I could, I rather have more battery life). It was the first time I played a game at that framerate. And it was... Surprisingly smooth. I played the game before at 60fps on PS5 and while it wasn't exactly the same experience it was much better than 30fps for example. Going from 30 to 40 doesn't sound like a huge increase on paper, but 40 felt closer to 60 than to 30 in terms of smoothness.
I'm saying this because I wish more games went for 40 fps when 60 it's not an option. Specially now that the Switch has VRR (on handheld mode at least, which is how I play most of the time).








