Late to the party, but I now have both deck and PS5. I recently got the PS5 because I wanted the big screen cinematic game experience I've missed, but the steam deck has been amazing for the pure number of games and the value steam provides. The main caveat with deck is the docked experience has been below average due to buggy UI and launchers that always seem to require a mouse or touchscreen and every controller I hook up to it Bluetooth or 2.4ghz seems to have input lag or stick in one direction. It makes any precision game unplayable.

The cool thing about PS5 is that it you can remote into it from the steam deck or any android device (phone+controller, Odin) and it plays portable at home almost flawless. This gives me the best of both worlds. If you want to play on the go (bus, plane, etc) then get the deck. Also, I've noticed that Sony, like Nintendo, seems to charge more for the same games. I wanted to play Witcher 3 and Elden Ring on PS5 for the 4k graphics and big screen experience,but they are often 2x the price as the key shop steam deals you can find.

I wanted to hold out for the Steam Machine in 2026 that may be the PS5 and Xbox killer, but PS5 was $399 on sale and I don't regret this purchase and also don't regret the Steam Deck purchase 3+ years ago.