Nobody gave a s**t back then if a bass amp was solid state or not, certainly not the GOAT (with his Ampeg 360s).
I get it about the coolness of having. Oh yes, the best amps of that era sounded sooo good but mainly when cranked. The 360 could produce deadly low end with definition, but was solid state. I now use an Orange Terror head into a single 12 no tweet Orange Cab, warm tubes and a fretless are a great combination. I have other stuff that will get louder but these days that’s usually an outdoor gig. For just “neat to have” I’ve got a ‘67 Ampeg B15, got it in ‘73.
Nobody gave a s**t back then if a bass amp was solid state or not, certainly not the GOAT (with his Ampeg 360s).