I seriously don't see me using BC like that because let's be real, by the time PS5/XsX comes out we'll be occupied and fixated on NEW games and new features. The exception is people just getting into titles that came out in the last year or so and upcoming current gen titles.
Plus, we don't know how they'll be handling cross gen games on PS5. Will they just simply allow you to buy the PS4 version and when you run it on PS5 have it download patches/updates that basically "remasters" the game? I hope so because there doesn't need to be any more remasters because at least with PS4 the remasters were there partly because there was no PS3 BC and older gen games deserved full on remakes(Crash, Spyro, SOTC etc.) With PS4 games they'll look amazing regardless so simply upping the image quality, having higher framerate options and better details would be enough.
Plus, we don't know how they'll be handling cross gen games on PS5. Will they just simply allow you to buy the PS4 version and when you run it on PS5 have it download patches/updates that basically "remasters" the game? I hope so because there doesn't need to be any more remasters because at least with PS4 the remasters were there partly because there was no PS3 BC and older gen games deserved full on remakes(Crash, Spyro, SOTC etc.) With PS4 games they'll look amazing regardless so simply upping the image quality, having higher framerate options and better details would be enough.