I certainly don't think its worth it in an economic sense. Acquiring the needed equipment for glass blowing, vacuum, spot welding, and and all the materials required is insanely expensive even if you make almost everything yourself. I just the satisfaction of building a radio truly from scratch might be worth it to some people. Anyway its certainly cheaper than acquiring a contact aligner, vacuum system, bakeout kiln, spin coaters, mask stepper, and the tools required to make a set of chrome on silica masks required to make ones own planar transistors, not to mention the heinously expensive chemicals to prep wafers. (I can dream though)