I refuse to buy digital games, because you never truly own them.

In that regard, physical and digital are really no different anymore (at least for AAAs). Doesn't matter if you can still install the game if it relies on connecting to a remote server somewhere that the company can turn off whenever they want. IMO Ubisoft has been historically the worst for that, but pretty much every major studio is doing that these days.

Working offline modes for games with single-player modes, and self-hosted servers or P2P connections for multiplayer games are something that should exist in nearly all games but are increasingly disappearing.