"Digital radio in Canada"

"The Commission is very concerned about the stalled DRB transition.
Roughly 15 of the 76 authorized stations (including the digital-only
operation in Toronto) are not on the air. Some stations that once
operated have since ceased operations. Few recievers have been sold,
and there is no interest in expanding DRB service beyond the six
cities where it exists. Since DRB transmitters have only been built in
the largest cities, motorists travelling between Quebec and Windsor,
between Calgary and Edmonton, or between Vancouver and south-central
British Columbia lose DRB reception. As a result, automakers have
switched their support from terrestrial DRB to XM/Sirius satellite
radio."

http://americanbandscan.blogspot.com...in-canada.html

Just as in Canada, few receivers have been sold in the U.S.