Thank goodness the tubes in my LS26 are new with low hours on them and I have the old ones still with 4000 hours on them..
Recently I purchased a Schiit Freya for my second system and thankfully it has a solid state mode.
If price gouging for tubes becomes the new norm, then tube gear will go out of style as fast as BetaMax vcr's did.
I'm hopeful the void will be filled in time.