I am ver skeptical about NS2 running Flightsim since it's very reliant in CPU (NS2 weaker component it seems) and good internet (another sore point of the OG Switch). I don't think it being able to run it (or not) relates to it being able to run GTA VI.
Even if in the end it could run any of those I would wonder: at what cost? I would think resolution would be very low and dip below 30fps.
I'm not worried if NS2 can't run those games in particular since they I don't think nobody would choose to play it at a diminshed performance for portability since day 1 and most ppl want to play it on a home console or PC.
I can't say if this is a disaster in gaming industry or it's a win.
I mean, more games for more people, that's good. But Sony competition has been brutally zeroed, which, apparently, it's not good. But the funniest thing is that Microsoft literally harakiried itself.
It's releasing almost 5 years later with Xbox Series S & lower end PCs in the picture so yes it should be able to run a version of any game released so far unless someone push certain techs to the limit in their game & it can't be scaled back easily without rebuilding the game.