PS6 will launch holidays 2028 latest with 24gigs of vram minimum, even 60xx series of cards which most likely we gonna see before ps6 will have 6060 with at least 12gigs of vram, ofc it will cost 450$+ streetprice(fake msrp doesnt matter) but thats another story
8gigs of vram on a card isnt a problem as long as its priced accordingly, aka 200usd or less streetprice, remember we had 8gigs of vram ps4 launched in holidays 2013 and few months later 750ti with only 2gigs of vram launched, and every1 loved that card, key factor is- it performed similar to ps4's gpu(which was 400$/€) but with actual msrp and streetprice of 150usd, aka 2,5x cheaper from the console
Currently if we had 8gigs 9060xt streetprice for 200 usd it would get praise too, ofc it will be much more expensive coz even its 8gigs model has official msrp of 300$ and who really knows actual streeprice, amd has terrible record this gen.
Again compare that shit to current gen console, since thats a benchmark, ps5 digital is 450 but lets be generous and do like for like aka last gen ps4 with discdrive was 400, now ps5 with discdrive is 500 too, so 2,5x cheaper card can have much lower vram, but keyfactor is- it has to be much cheaper- 200usd aka exactly that 2,5x lower price.
TLDR: There are no bad gpu's, just badly priced ones. Even that awful rtx 5060 that gets decimated in any non sponsored(famous ngreedia "preview" program FTL) review would be solid gpu with 200usd streetprice instead of current 300$. Yes, budget concious customers which are tens of milions around the world(i know what im talking about, im polish, tons of ppl buy cheap/lowend gpu's here, always did) will gladly buy those weak small vram pool gpu's as long as those are cheap af, same way ps2 sold from 100m to 160m units after ps3 launch, most of those late in the lifecycle units were sold outside of rich countries at 99$ or close to that