To be clear it was not my intention to argue semantics. I was just pointing out that tube amplifiers can be either single ended (SET and SEP) or push pull (PP). Furthermore PP can be class A or class A/B. Perhaps I interpreted your post incorrectly. But it seemed to suggest only class A/B amongst non SET amplifiers. I was attempting to supply clarification.
For the record, I am also an advocate of SET amplifiers and an extremely happy long term owner of 300b mono blocks. I concur with your sonic assessment of SET with appropriate speaker pairing.
Charles