[Paal Gulli]

It's not that there aren't any bands, it's that most acts now are solo artists or duets. Bands are being created at a far lower rate and are being increasing less represented on the charts since the 1990s.

Why Are Bands Mysteriously Disappearing?

40 years ago, nearly all hit music was recorded by bands. Now it's single digit percentages.

[T.B. Yoits]

40 years ago, nearly all hit music was recorded by bands. Now it's single digit percentages.

Most of the music 40 years ago was made by one writer, maybe one collaborator, and professional studio musicians. If you see a lineage chart of bands at that time, most of them had regular changes to the lineup except for one or two key members. It's rare that a band could gel well enough to make one album, much less two or three.