Hmm. Not that it is big deal, but I would be somewhat worried about true longevity with the VRAM. Not sure if SteamOS helps there, but on PC some new titles are going over the 8GB VRAM.
One of the things I've noted for a while is that PC gaming as a platform seems to be polarizing between high and low spec, especially if you look outside of North America/Western Europe to places like South America or SE Asia. The steam deck and now this seem to be a reference/target platform for the low spec group. It might not be able to play the prestigious high spec titles well if at all, but so long as "your mileage may vary" is messaged well I can't see it being a problem, it hasn't so far.
There's a certain category of person who spends thousands of dollars seemingly just to see bigger numbers in benchmarks and to flex their consumerism on people. I've seen quite a lot of commenting about how certain games are "unplayable" on the steam deck, games which I have been playing just fine. I just turn the settings down to low and enjoy the game.