I find myself convinced by much of what @atmasphere says.
I was lucky to be taught tube design at university (due to the non-retirement of an aged lecturer). In other labs I manufactured ICs!
Tubes have a lot of strengths and it’s quite possible to design reasonably accurate line-level amplifier stages using them. When it comes to power amplifiers, the need to use a transformer to effectively convert lots of volts to lots of current, creates many manufacture challenges, especially at very low frequencies. It’s also hard to avoid relatively high output impedances, in which cases, the sound can eb affected by the speaker’s impedance curve and every instance will sound different (but not, strictly, accurate).
The low cost and size of silicon and germanium devices means it’s economically possible to use 10 optimised devices for the equivalent of a singe tube - which can be compromised though having to do "too much". One approach is to use a 40+ tube amplifier, but even the most enthusiastic supporters find that a bit difficult to imagine :-)