My therapist has told me briefly about her therapy history and references it occasionally, or will answer questions briefly about it if I ask her- it is sometimes reassuring to know she's been on the client side, and also how sincerely she feels about the value and depth of therapeutic relationships. She also says, like Asiablue mentioned, she wouldn't hesitate to return if she needed it, but that after such a long time in therapy, she can typically be her own therapist now- and that she's internalized her previous therapists.