More likely there business model became no longer practical.
Sharp management might have been able to move into a different business model, but I don’t think anybody could have kept this one going.
Sort of like Kodak and film, or Blockbuster and video rental. When your market goes away, even brilliant management can’t bring it back.
As a kid in the 1970s....I can remember going over to buy a 8-track player, a CB radio, and a loud-speaker for my car. I haven’t been inside of a Radio Shack since 1989 (I bought my first PC there).
I think the key here....is that they really didn’t change. Same style....same thinking....same advertisements...as they had in the early 80s.
Arduinos. They sell those and Grundig shortwave radios.