PS5 could see even more 3rd party exclusives than PS4

[Conina]

And on PC and Xbox the Yakuza series is prospering, ain't it?
Or why are more and more Yakuza games on these platforms.

SteamSpy's estimate for Yakuza 0 is over half a million units:

The audience ain't that different on Playstation, Xbox and PC... so multiplatform makes sense in most cases.