Nowadays I'm practically using plexamp far more often than I watch my own video content on Plex. I started using Plex for music about 6 months ago and plexamp has been such a powerhouse of a music app in ways I never expected. I really appreciate the specific DJs they give you with sonic analysis. I've realized it's also made me enjoy buying CDs again, which are especially cheap these days!
I've used it for a while now. I will still probably use it on the desktop but for my phone/car I switched to Symfonium because of the stupid download restrictions of Plexamp. I like Symfonium well enough and it will also pull from Jellyfin if I ever fully get rid of Plex.