With the talk of Erenst (The solo guy running kbin) missing in action, there's talk of communities migrating over to other instances that are maintained by more than 1 person.
mbin is a fork of kbin that is actively being worked on by more than 1 person.
We'll stick here and wait it out, and see if it becomes more stable.
Still no talk from Ernest about expanding out a team for something as big as kbin.