Why is everyone saying that server issues don't mean the update? v21 is supposed to get rid of the terrain and interiors. Maybe Badspots needs to shut down all the servers or forget them in the ass to be able to update to the next version.
It's never happened before an update. I doubt it's going to now. It shouldn't have to change the servers immensely, only adding the coded floor I'd assume, and the master server wouldn't have to shut down for that. The GLshaders are client-sided, so that's insignificant to the master server shutting down.
The issue is here that most people have no idea what they're talking about and assuming that something big is happening, when in reality the server spontaneously crashed.