My now-departed MFA separates were certainly a joy to listen to. Over the years the mono amps and Luminescence preamp were significantly upgraded a few times, yielding even more musical enjoyment. I reluctantly sold those components due to their age (maintenance) and my desire to down-size.
I had a virtual closet-full of spare tubes- the most difficult to source was the quad of octal tubes for the RIAA section. They needed to be extremely quiet and it was hit or miss- often a "big miss." :) Between the mono amps the preamp and power supply, the gear took a total of 26 bottles. :)
Now I'm thoroughly enjoying a CJ control amp which has a mere 7 tubes. :)