How fast should Sony abandon PS4 once PS5 launches? IE repeat PS4 or pull a Switch?

[BananaKing]

Could contract out the port like lots of big publishers do.

EDT: out of Sony published games, was GT6 the only one to release on PS3 after the PS4 launch?

Infamous, Driveclub, Bloodborne, and The Order didn't have PS3 ports.

Lbp3 released on PS3 as well as PS4