I've never experienced such a long warmup time with tube gear (usually fine in 20-30 minutes with "maybe" a slight improvement over the next 30 minutes).
Of course the speakers, turntable bearing/cartridge, CD deck, tape deck et cetera were also warming up @ the same time.
This said (since the 70's) I've never owned PP amps with large output tubes (just PP 6L6/EL84/EL34, and single ended EL84/2A3/300B amps).
DeKay