Amen! It is a shame. I remember when all the Marshall heads started shipping with 5881 back in the early 90s because of the shortage of reliable EL34 tubes. Guess everything is a cycle. I hope this doesn't mean mullets are coming back!
Anyway, because I have had a hard time finding a reliable and good sounding EL34 recently, I've tried the 5881's and 6550's. I've rediscovered some tones I had forgotten about using the 34's. I guess this shortage is not such a bad thing after all.