That resolution will take a lot of vram to push. Start gaming or editing on it and it will get crushed. Most 290x's start at 4GB, why Apple chose 2GB I don't know.
Only 3090 on steam. Which is ~1/3 of the while windows back log. And a large chunk of the imported games are older games, so Linux and Mac both are making steady progress.
Can you elaborate on this, or link to someone who has elaborated on it?