Came back to MGSV after a couple years, to get reacquainted and work on some completionist stuff. First hour was rough, then I remembered how to play, and now I'm enjoying the good bits and replaying missions and doing side ops.
But also remembering the bits it is weirdly stubborn or dumb about.
And just rediscovered one very stupid little bit: no checkpointing on Mother Base, so if you e.g. spend 30 minutes doing target practice ops and then fall off a platform and die, fuck you, redo them.