I really have my doubts about this "world-wide renaissance of radio".
The average user of radio and especially SW isn't likely to go
to the added hassle of DRM. I have played with DRM and
I am very underwealmed. DRM radios consume much more
energy, IE much shorter battery life, then analog. A lot of
users have no access to "made" electricity and have to
rely on batteries. The greater radio complexity also promises
greater user headaches.
Just my thoughts.
Terry