Board Thread:Questions and Answers/@comment-25139993-20180917030223/@comment-995426-20180918053413

Fishface405: The Mirage turtles were not superheroes. They were sporadic vigilantes (having the right skills means you're sometimes in the right place at the right time), but they were usually more concerned with surviving rather than any notion of saving the day.

Furrytoonosaurus: And I think that was part of it&mdash;sometimes it was just more practical for the turtles to live together in one safe secret place, which remained secret even after the official Utrom first contact. But I think part of it is also choice&mdash;they had certainly tried various degrees of living apart during volume 2, especially Donatello (when he was recovering from the physical trauma he suffered in City at War) and Raphael (who got fed up with Leo and Mikey in close quarters in their basement studio apartment). But really, the lair they ended up finding in volume 2 (and still lived in during volume 4) was pretty much the perfect lair, so it was always a place they could come home to. But as strongly foreshadowed in Rocks, even this togetherness was always destined to end as the turtles ventured off into their own separate lives.