Just logged into my dormant SoundCloud to check the activity of a bunch of friends and acquaintances. Looks like most user activity (liking tracks, add to playlist, etc) steeply dropped off ~13-11 years ago, and I see virtually no one active after ~7 years ago. Not sure what the cause of that is..
I guess since then the platform saw some success as a home for lo-fi hip-hop, so it seems a new generation of youngsters have gotten something out of it. Good for them. For electronic music I think we mostly went to Bandcamp and Mixcloud, especially when Beatport sold out too.