> Yup. I just finished putting 100 hours into Dark Souls 3. Anyone who says there aren't any quality single-player games anymore just isn't paying attention
The Dark/Demon Souls franchise is the undisputed king of forced online participation. MGS V has the same forced-online elements in the form of bases. You are literally penalized in both games for attempting to play entirely single-player.
I haven't played enough of the other examples to comment.
People famously play those games without an ethernet cable attached simply to play with some kind of similarity to a true single-player game -- I think that points to something being different between today's single-player games and yesterday's.