If I'm in the mood for being a little glib... where do you think that Linux distribution that SteamOS is based on got its user-space (or more seriously, its drivers?)
Also: the SteamDeck is by any reasonable standard a console. It just happens to run a windowed environment out of the box. Don't be that guy. If you want to pump Valve, focus instead on their contributions to the Wine project.
No idea why the personal involvement with valve pumping has come from. Atari "VCS All-In Bundle" is debian based, too. They are not playstation popular, of course. Like mentioned "no love for consoles", dont own one, not interested, either.
Also: the SteamDeck is by any reasonable standard a console. It just happens to run a windowed environment out of the box. Don't be that guy. If you want to pump Valve, focus instead on their contributions to the Wine project.