More that times were changing as the 70s came in. That’s not necessarily a comment on the quality of the music. But seven years is a pretty good run, all the same.
Fair enough. Although given the commercial success of Paul, George, and Ringo in the 70s, it appears that they adapted pretty well to the evolving musical scene.
You're right that the musical scene was about to change in huge way in the mid-70s with disco taking over. Although some 60s performers had some success with disco, only the BeeGees thrived to be accompanied by a whole bunch of new acts.