The licensure-portability problem, in plain language
In the United States, mental-health licensure is regulated state by state. A therapist licensed in California cannot legally see clients who are physically located in Vermont, even by video, even if the relationship has been going for years. The therapist who knows you, your history, and what works for you has to refer you out the moment you cross a state line.
For most clients, this is invisible — until it isn't. It surfaces when someone moves for a job, takes a remote-work sabbatical, sends a kid to college in another state, or splits the year between two homes. At that point, the choice is usually: stop therapy, or start over with a new clinician. Starting over means a new history to retell, a new rapport to build, a new approach to learn. It's often the moment people drop out of therapy entirely.
Maintaining licensure in multiple states takes ongoing fees, continuing-education requirements, and state-specific board oversight in each one. Most solo practitioners simply don't do it. I do, because the alternative — handing clients off every time their life moves — is the opposite of how good therapy works.