This would bother me for two reasons:

1. How much longer will she be practicing before she decides to retire?

2. This, in combination with her involvement with the satanic ritual cult hysterics decades ago, could possibly indicate that she is not up-to-date with the latest practices in therapy. While I'm sure many older therapists are dedicated to continuing education and reading the latest research, the fact that she made a name for herself in the heyday of a particular kind of quackery makes me wonder.

I briefly saw a pdoc who was in his elder years. He insisted I do talk therapy with him if I wanted prescriptions from him even though I already had a therapist. I soon learned that he was clinging to some outdated ideas about therapy, medication, etc.

I don't want to make it sound like all older therapists are behind the times, but your potential T's age PLUS the other things you've said about her, I think, are concerning.