Old Man Logan is a really good post apocalyptic Marvel story, marred only by the fact that bleak post apocalyptic marvel stories are a dime a dozen, and Marvel not knowing when to quit as they stretched out the Old Man Logan universe as far as it could go, until the character itself got folded into the 616 continuity.
And that's not even including some other storylines you mention with "616", that I have no familiarity with.
It's not just a storyline. There was a period where the mainstream continuity Wolverine died, and he was replaced by Old Man Logan (in all the teams). It's poorly handled, too. Unlike his version in the miniseries, Old Man Logan in the mainstream 616 continuity is basically the same character, just with grey hair (grizzled, with a lot of emotional baggage and frequent problems with his age is not a defining trait, because normal Wolverine already has those qualities.)
