Could PS5 do quick resume? Most likely yes, if Sony wanted to. How much reworking on the software it would need, no idea.
Personally I dont see quick resume as essential feature, just like VRR =
gamers have lived decades without it, so it is far from essential feature, nice to have, but it is nothing that we cant live without.
I personally bought Sony A8H last year as I didnt care about VRR and still doesnt care, console games have been good enough till now so adding VRR doesnt solve anything because there isnt anything to solve (to me).
I just dont see the importance of "I can play game A, then jump to game B, then to C, then to A!" as a selling point.
Yes, some people do that for some reason, but it feels too alien to me, but yet some people see it really cool thing to do.
Yet we all are "right" from our personal point of view.
But who honestly literally cant wait for 5-60 seconds while switching between games, when we all probably "wasting" minutes while gaming, having small breaks etc.
It is like one reall fast car is 15% faster than another really fast car on drag race, owner of the faster car can feel superiority, while in real life nobody drag races or at least should do it on public roads, so it is useless to argue.
XBox and ps5, both load games faster than enough to not to be any problem. Last gen games like RDR2 loading minutes, that I can get that it sucks. But when it usually is 1-3s (quick resume) vs 3-30s (PS5 cold boot of native games) = nobody dies from old age while waiting for either of those times
Another thing that could explain this is that Xbox + digital games are popular on US, and Playstation and physical games are popular on EU.
So, as European gamer with 70/30 physical vs digital library quick resume doesn't sound that usefull, as finding & changing the disc takes some time anyway, so even if disc game would quick resume too, I have already "wasted time" to switch the disc and it doesnt matter to me anyway and it is a good chance to get up and walk a little.
BUT of course it is great that some xbox gamers find quick resume suiting their needs, nothing bad on it!
If somone wants to switch between 5 games within 2 minutes, then why not, be happy for them because they can. But they cant really force their behaviour based opition as truth for other people with different behaviour based opinions either, and vice versa.
Playstation gamers wont lose much without it either, kind of like if some people dont care about hapics + adaptive triggers = they dont lose anything while gaming on xbox.
I use "stand-by 1 game quick resume" on PS5 and used it on PS4 too, to me 1 game that loads instantly is really great, but more than 1 game would not be that important to me.
I usually play 1 game, and if somebody wants to play multiplayer game, I just switch discs and load it, it doesnt take that long to feel like a nuinsance.
Now if it would be that xbox could quick resume 1 game (or more), but playstation could not at all = then I would get it that there is a major featural difference.
Personally I see this thread kind of weird, because people are fighting for opinions and personal preferences, there isnt really any 1 truth.
Quick resume is great if it works and user needs it, but it is also not important if it doesnt always work or user doesnt need it.
It is also showing how close these new consoles are, because people are literally arguing hundreds of pages for SECONDS of loading time / quick resume, or REALLY small fps / graphic differences.
Will I personally use quick resume, when I manage to get series x? yes, probably as it is more hazzle to not to use it, than use it. Will it be major factor to me to get xbox?
No. Games that are not on PS5 are.