Ever remember a group or or artist in their salad days and not being that impressed at the time. For me it is ELO. They certainly have rhythm and melody, something frequently missing in modern music.
For years I never listened to anything but rock. I have mellowed out in my older years. A little country now, but not too much.
I bought one ELO album back in the day. It's catchy, and smooth. Can be pleasant for background music. I rarely put it on though. No high degree of musicianship skill and the recording quality is bleh, like putting paste polishing wax on a car finish and forgetting to buff it out. So yeah, okay for bubblegum background music gently emanating from 7" ceiling tile speakers.
One big change, I liked Wasn't Born to Follow, by the Byrds From Easy Rider movie, 1969. Lately been listening to Carole King who to my surprise wrote this song. She adds another verse. That along with White rabbit are only 2 minute songs, I could have listened to both songs if they were 2 hours.
Yeah that's one of the benefits of improvisation in music -- rather than a carefully outlined song, the musicians dedicate portions to passing the solo around. That can significantly extend the time of a number.