I bought a Steam Deck just to support the most important thing that ever happened to Linux gaming, but mine has actually just been gathering dust. It’s far too big to really be a handheld, doesn’t fit in my pocket, and does not fill the role that Nintendo’s handhelds served for me. The main thing I do end up using it for is taking Deck + dock to FGC events for a portable setup.
Last year I bought a Miyoo Mini Plus, a little emulator handheld, as an impulse buy because it was on sale super cheap. I ended up putting far more time into it than I ever did with the Deck.
My ultimate dream would be to someday get SteamOS running on a DS-sized form factor. Doesn’t need to be beefy, just needs to fit in my pocket and run my favorite 2D indie games.