My tube amps are going strong and will remain for the foreseeable future. I've even acquired a couple more in recent years, some as future projects, some working fine now. Fortunately, I managed to re-tube everything currently in my system, all the completed projects, and stocked up for the future projects prior to Russia invading Ukraine. The cost seemed high at the time, but seems mighty attractive compared to what I'm seeing now.
Don't sell your tube amps
Although this was an article in a guitar Magazine, I thought it might interest those who own stereo tube equipment:
https://www.premierguitar.com/gear/amps/dont-sell-your-tube-amps