"There was continued top-down advocacy of HD Radio from David Rehr,
but little support from attendees...

Just like FM.


That never took root either, did it?


There was plenty of interest in FM in it's early days, but FM had a hard
time establishing itself in competition with new entertainment technology,
that is, television.

Well, it's a good thing people didn't promounce it a failure after a couple
of years.