I am a student (by avocation) of Fritz Reiner, his story, and his music. Maybe because I was getting into concerted music when he was Music Director in my home town.
I find it slightly ironic that Lenny was one of Fritz’s star conducting pupils when they were at the Curtis Institute, because their conducting styles were almost diametrically opposite.
Was Fritz more like Karajan? I don’t know anything about him, but I find your comment fascinating.
Reiner anecdote (no, not the "telescope" one):
Reiner and his wife were in the audience at a Bernstein-led concert. When Bernstein started his "Leaping Lenny" stuff, Reiner turned to his wife and said, "He did not learn that from me."