Been entertaining thoughts of starting a vacuum tube manufacturing plant like since 2019 when Shuguang factory in China was destroyed by fire and no production since.
EHX have just declared that there is no more vacuum tubes for the foreseeable futures, so JJ tubes from Slovakia is the only choice left if you want EL34, 6L6.

Now Western Electric is reissuing 300B for 1500 USD for a piece of glass that heats up and burn, I say why not start a business that have great demand from audio and guitar amplification which have very few competitors?