The Winner Takes It All is in Mamma Mia, so I'm very familiar with that one. They wrote some of those songs after they got divorced (since they were married couples) so Dancing Queen, Andante, Honey Honey, and such were pre-breakup, and The Winner Takes It All, Mamma Mia, and Angel Eyes were post breakup.
My mom also loves Abba; she listened to them as a teen. I believe she has a record somewhere. Dad was not and still is not a fan, but what does he know.
I also have an eclectic music taste, as does my brother. He also likes Abba. Mom and I went to see Stevie Nicks back in September. One year, my Spotify Wrapped was Hamilton and then Uptown Girl by Billy Joel randomly thrown in. Not the biggest Beatles fan except for Twist and Shout, which I love. But I also like Taylor Swift, Dua Lipa, and some more modern artists.