Thing is that even before the situation in the Ukraine tube supply was tenuous at best. fender bought up several months of JJ's production plus the Chinese factory issues. If there is enough demand someone will fill the void problem is, is their enough demand?
If the long term prognosis of tube production is truly in crisis mode all the tube amp manufacturers should just close their doors and embrace solid state as the future of guitar amplification. Somehow I doubt that happens. People just need to CTFD.