The "art" of homebrew is rapidly disappearing!
I must disagree somewhat.
I used to think that. But then I encountered Electric Radio
magazine, and found there was some serious homebrewing going on. Then I got online, and discovered even more.
Of course parts are higher priced and some things are unobtanium. But at the same time, there's far more info available online than we ever had in the old days, plus parts and entire units for sale.
Homebrewing is a niche thing today, yes, but it's been a niche thing for longer than I've been a ham (44 years plus).
73 de Jim, N2EY