> Move to a new state without having to change jobs.

I see this point but it's often not a guarantee, particularly if you work at a small company. In the US if your employer is in State A and you want to move to State B, then your employer must become registered as a business in that state and abide by that state's labor laws. Many small businesses aren't capable of (or interested in) maintaining compliance with every state's laws.

I believe this will change in the future, but right now I wouldn't bet on it.