Why?! Did you people even play the Runaway series? The games are decent, not extraordinary, but decent. Plus, Monkey Island is really overrated. Unless you understand this, you'll never get the "point" in modern point-and-click adventures.
Heck, I saw sites where people are boasting the return of the
Adventure genre with the Tales of Monkey Island...
Like the genre was dead in the first place. There are too many adventure games better than MI. Let's admit it, the only reason why it was and is so popular it's because it's very simple to play and directed toward the casual masses.