Why would you use tubes for that? I can see for critical listening, but for background you just want something dependable and reliable since you aren't zeroed in on sound quality
The last time one of my valve power, phono, or preamps took a shit was over 10 years ago, and I lost a NEW GL 12AX7 in a C2500 on the right channel. I was up and running in less than 45 minutes. I put in a set/pair of Amprex. That C2500 unit has 6000+ hours on it. The wife's system. Every day, 2-6 hours.
I have an MC225 with the original valves (1965 or so), and that amp was played every day for 25 years after work. If I remember correctly, it lost a Telefunken 12AX7, which was replaced in kind. It took all of 10 minutes to fix. It has an easy 7-8000 hours on the valves.
Other than contouring the sound with minor changes inside on Carys that I use or changing the valves from one type to another, they just don't break. All of my older valve units are 20-60 years old. Cary and Macs.
I have a Herron V2 that I took the top off to clean a couple of times, completely bulletproof.
Of the 40-45 pieces of valve gear here, they are just as reliable as the 40 or so pieces of solid-state gear. I know I can fix a valve-based piece easier and faster than any of the SS gear I have.
Dependable, reliable? Very much so. At least they (the tube gear) has been for the last 51 years. A tube fire here and there just keeps you on your toes. LOL
Regards