Imho, the Steam Deck will be the only one with a really long product lifetime. Simply because Valve's main business is selling games, not consoles. The Deck makes people buy more/different games. Worked on me. I haven't played much in the last decade because I was too tired to play at my PC after work. Now I can play everywhere. Couch, bed, car, .. Basically every other manufacturer makes money exactly once by selling such a console. As soon as their marketing is done with it, they'll release a new revision and you won't see a single software update for the old model ever again.