Not true the Xbox series OS is 2GB in size running in ram not mere megabytes as you claim.No it won't be. A console doesn't have any of the garbage that PCs do. The OS eats hundreds of MBs not GBs. It doesn't duplicate data like PCs do (loading the same data in system and graphical memory).
Microsoft sent a game developer kit that gives devs more control over the memory of the Xbox Series S.
Sony unlike MS has not said how much vram they use officially but according to devs unofficially its 2 to 2.5GB.
So you're very much incorrect sorry to report.