On the licensing part, full removal from your account is going to be very unlikely imo, although technically still possible. Big games now are all money making machines and micro transactions are clearly a model that they want to push forward. They’re not gonna want to be losing that revenue stream.
If a game gets ‘delisted’ for whatever reason and you have it installed in your library, you can still re download the game. It just won’t be on the store for future purchases. I think this is the key part imo.
If the account is banned or inactive (3+ years) then everything goes forever. Or if the producer pulls the rights for whatever reason, then it’s gone gone. I really can’t see that happening with 99% of games, certainly none from a big franchise anyway. Seems to be more a concern for other types of media/material like films etc.