K.M. Richards
Program Director, The Eighties Channel™
The FCC initially had a system aproved that could have had AM stereo on in 1978. But one of the non-approved system owners filed legal papers and held it back for roughly 4 years. Then, the FCC just told us to do whatever we wanted and chose no system.
Even 1979 was kind of late. By then, over half of all listening was to FM and about two-thirds of music listening had left AM.
What I always said about that is the losing party who filed that challenge lost even bigger. The combination of the legal bills and the length of time the decision was held back killed any chance they had to both win the battle and capitalize on it. I'm sure they thought it would either be settled quickly, that the other systems would cave, and AM would be dominant forever. None of that was the case.
Remember always to be careful what you wish for. You might just get it.