I have owned a fair amount of tube equipment: preamps, amplifiers, and sources. None have had any problems other than normal tube issues.
Troubleshooting and finding quiet tubes can be a hassle, but it's worth the effort to many people.
The only amplifiers that I have owned that are worthy of replacing tube amps have Class A topology.
I have not owned a 100% solid state preamp that has been worthy of replacing a tube preamp, or in the case of what I presently own a solid state preamp with a tube power supply. However, my experience with solid state preamps has been limited and has not included any state-of-the-art units.
I will shortly be auditioning a SOTA solid state preamp, so we'll see...
Anyway, the answer to your question is that the tube equipment I have owned has been reliable: VAC, Lamm, Moscode, Atma-Sphere, Modwright.