The steamdeck has matured and because of its architecture there is no meaningful upgrade or change you can do to it yourself besides storage.
Valve has made it very clear they have no plans to release another one, the OLED was their final refresh of the design. Their focus in that arena is on bringing steamOS to different platforms, perhaps another round of Steam machines, but they have explicitly said they are not taking another crack at mobile hardware right now.
samus12345@sh.itjust.works 1 day ago
The difference is that nobody’s releasing games specifically made for the Deck. Some are including optimizations to make their games run decently well on it, but it’s not a AAA machine. I bought one knowing this full well and am satisfied playing less demanding games on it, but it’s not going to be playing new demanding games, unlike with dedicated consoles.