My T and I have "been together" for almost 30 years. During that time, her boundaries have gradually shifted, sometimes in not-so-good ways, but, mostly, in good ways, at least, good for me, lol. As for the bad ways her boundaries have changed, I think we haven't really talked about it, I just adapted to it.
But, since her cancer diagnosis, her boundaries are much looser, at least with me. I can't say if the same is true with her other clients.