No, the point of the OP was to blame Marshall’s new ownership. Now you are moving the goal post to include things like global supply chains. Tube amps are fading away, as suppliers age, their children will not take over, the end will arrive within two decades.
They exist to sell full amplifiers. The parts are generally generic and readily available elsewhere, so why be bothered with a few do-it-yourselfers, who may want to perform returns as well. It’s a distraction from the core business.
I started with GHS, but they had a few QC issues in the late 80s. I had no better luck with Ernie Ball, and then switched D’Addarrio. Never had any issues, they were competitively priced, readily available, and here we are thirty-five years later still using them. I feel no desire to try...
My dream guitar was an alpine white Les Paul Custom. I saved up for it, got it, and had nothing but problems with it. The neck twisted. Sent it back for warranty repair, nine months later it returned “fixed”, yet the box had never been opened by Gibson. Sent it back, they shaved the...