He really is a PR man telling bullshit to appease Switch fans.
The main problem isn't even the GPU. Everything can run on Switch GPU as long as you reduce the resolution to 360p (like some games) and dramatically reduce the quality of effects (but that would need a lot of work to reduce textures and effects for the whole game, but that has already being done on some games like Doom or Warframe). The real problems are:
100GB of data on disc, how do you do that on Switch ? 5GB ram for the game to run is mandatory (such an open world is memory hungry), and a powerful CPU is needed to run all the open world systems. In some places the game already runs at sub-30fps on consoles, we know Rockstar know how to optimize the CPU jobs so it couldn't run much better. So it would run at sub-15fps on Switch. It's only locked 30fps on Pro at a mere 1080p.







