At this point this is old news really. I use tube amps and mostly NOS GE 6SN7GTBs (four of them in my preamp, one in my power amp) of which I have plenty, and just recently bought a back-up pair of KT66s (I have a stash of various tubes to last for years) for my little single ended amp. I just rested my aforementioned tube power amp to try a "tubeless but you’d never know it" Pass XA25...still breaking that thing in but so far it’s astonishingly good...may be resting my tube power amp for a while, thus sacrificing a chunk of my tube cred and avoiding any Russian tube quandry...Oh well.
Tubes becoming hard to get?
An article in today’s WSJ talks about tubes for both guitar amps and stereo gear becoming scarce due to Far East and Ukraine/Russian tensions saying most tubes originate from China, Slovakia, & Russia. As such, people are beginning to Hoard and retailers are beginning to limit purchases.