I use my steam deck docked primarily to stream from my main PC to my living room. I haven’t noticed any battery degradation when I do use it in handheld. I got it March 2022.
Also if you happen to be using Emby as a media server, the emby theater app image supports controller :)
I’ve had more fun in the last 2 weeks I’ve been playing Rivals than the entirety I’ve played Overwatch 2. The game just wants to seem more focused on being fun rather than competitive.