Unless they signed bizarrely horrible contracts at least some of the staff will be getting residuals. By way of imperfect comparison, Ringo Starr's annual income of $20m doesn't come from doing the Xmas Special of "Thomas the Tank Engine"

Apple Records is still legally a going concern, though. (Though again there's the complicated situation with his songwriting royalties etc.)

And in the same sense, Zachtronics can cease to exist as a studio, but they can keep around some legal entity that collects the royalties and distributes them to former contributors.

If that's the case then it makes sense. From the sound of it I thought they were dissolving, but it makes more sense to just cease operations.

I'm just speculating.

But it would make sense to call what they are doing 'dissolving the studio', even if some legal entity (either the same or a successor) stays around.