I have owned tube equipment for about 12 years now and have had very few problems. None with tube preamps or DACs, but my music reference RM9 had to be repaired twice. I also had to replace the power switch on one manley labs monblock. Tube failure has been very infrequent and has never caused equipment failure when it happens. My Canary monos have been in my system for almost a year now with nary a hiccup. I think the sound of tubes far outweighs any negatives.
Shakey
Shakey