Oh - and replying to my own post to add, the Scratch Orchestra led to an interest in Serialism and thus to Minimalism. I still enjoy and have been much influenced by Terry Riley, Steve Reich (if you don't know Different Trains: well, try it for contained musical horror) and even Philip Glass (et seq).
Different Trains (Reich)
Rainbows in Curved Air (Riley)
Koyaanisqatsi: Life out of balance (Glass)
These constitute a very different and perhaps more accessible modernism compered with Ligeti or Penderecki:
Threnody to the Victims of Hiroshima
In the end all the gear is about the music we can listen to, no?
My Spotify playlist does include rather a lot of genres

Including popular ones!