Since we just learned that Yakuza 7 saves on PS4 won't transfer to PS5 if you do the upgrade, this brings into question all the other games that are upgradeable. Cross-Save was a thing for Cross-Buy titles going back to the PS3. I'm assuming in this situation, Sony is leaving it up to the devs, which doesn't surprise me, but it'd be good to know which games support it and which games don't. At the very least, it'd be nice knowing the first-party games situation.