I haven't bought physical copies in many years, but now that publishers seem more prevalent on reiterating consumers' non-ownership of digital games, I become more and more sceptical. There's no stopping them removing games from digital stores or libraries. I often go back to replay older games - especially when the norm for big titles as of the last couple of years have been to release unfinished and unpolished games to the public. Big corps will always think money first and they know gamers will always come back.
Of course, I expect future consoles to come without a disc-drive at all...