"Improved Technology" often means producability. They are more easily made, and therefore cheaper. "Improved" does not always refer to audio quality.
Fashons change with regard to how a speaker should perform. Nowadays, imaging is king. Older speakers excell in reproducing large sounds, like a symphony orchestra, at realistic volume. Maybe that is more important than imaging. Doing both with the same speaker is the challange. My solution, by the way, and a lot cheaper, is to use different speakers for different kinds of music.
Fashons change with regard to how a speaker should perform. Nowadays, imaging is king. Older speakers excell in reproducing large sounds, like a symphony orchestra, at realistic volume. Maybe that is more important than imaging. Doing both with the same speaker is the challange. My solution, by the way, and a lot cheaper, is to use different speakers for different kinds of music.