Doesn't make sense to not allow those upgrades for free.
I mean even other publishers are giving away free upgrades whereas they could also leave the matter at BC and a boost mode.
Doom Eternal is a 2020 game and giving away free upgrade to all current owners.
CP2077 will be getting them as well for free and TW3, a game I think 5-6 years old?, is also providing upgrades for free
If I have to guess, it could be Marvel's pressure or something
Edit: And I don't think a 2 year old only game warrants the word remaster, should just be called upgraded