I've been going to hamfest for a LOT of
years and one thing
that I've noticed is that there's practically zero interest in
building stuff any more. Parts and tools that used to be very
sought after now go begging.
I'll agree - but perhaps the main reason is that
modern components are
almost impossible for the home builder ... and only the odd few (Tony? :-)
want to spend lots of time and a fair bit of money to build something that
is usually less capable than a less expensive commercial product.
Still things that are mechanical and less mass market are built today.
When was the last time you built a TV?
Most people today just have children watch tv or surf the net rather
than encourage other activities.
BTW Nuclear fusion on the small scale in a interesting hobby for the
man who has done everything.