I've gotten real id licenses in multiple states as a result of moving, and it's incredibly annoying because you never know what documents they'll actually accept. You basically have to bring tons of extra documents in case they randomly don't like the way one of your documents looks (e.g. one state inexplicably didn't want to accept my birth certificate because it had an official seal on it). Otherwise you could end up having to make another trip (which could be even more of a headache if you're trying to reregister your car and are signing up for new insurance, in which case there may be a deadline).