I think the Deck's capability to be relevant for years into the future depends entirely on whether PC game developers target it as a platform. Many of the top best selling video games from the past few years struggle on the deck even on low settings (Baldur's Gate 3, Oblivion Remastered are a couple I've tried with rough results). Of course there's still a massive PC backlog and ample lower spec games released each year.
Is anyone here aware of whether developers are using the Deck as a minimum spec and thus their technical constraints?
It's my target spec and the platform I test the most on for my outside of work stuff. The steam deployment app works so well it makes testing on the steam deck just as easy as testing on my dev machine with a gamepad.
At work it depends on the title but we've definitely used it as a test target. Usually in the minspec range