Some people already complaining about the $10 upgrade for PS5 but honestly I was expecting Sony to charge for full price remasters so this is great. I agrued before that "free upgrades" are basically devs doing extra stuff for free and should never be expected, people thinking next gen upgrades should be fully free is a fine opinion, but I have no problem with a $10 upgrade. When its a good quality port that boosts the game in all aspects, uses 3d audio, haptics etc. then its worth it.The should be free is pretty annoying.
$10 is terrible for the PS5 version, but honestly that comes down to the PS4 version already being so good on PS5. With the 4k (checkerboard) 60 fps mode. It feels really unnecessary.
A proper upgrade though, I'd be pretty happy to pay $10.
$20 for an expansion pack is pretty standard too.