I hadnāt come across this, I shall take a look 
I used to spend a considerable amount of time working on my music library, as I listen to a lot and Iām very fussy about music being tagged correctly and consistently (the hardest part given that most artists suck at tagging their music).
PlexAmp has come a very far way since itās initial release, and I donāt particularly have anything negative to say about it anymore. With that being said, the biggest flaw with self-hosted music is new music discoverability: simply as it doesnāt exist. I listen to a lot of music, and losing this discoverability sucked. So I ended up seeking a paid solution
I pay for YT Premium through Argentina, so I tried out YT Music for a few months. While the experience is okay, itās not particularly refined. In addition to this, they have this strange issue where you end up getting stuck within a closed-loop recommendations system, meaning discoverability plummets. Itās also pretty bad at recommending music thatās actually similar to what youāre listening to (understandably, metal sub-genres are a bitch).
I pay for Deezer strictly for easy music procurement for my own lossless library. I use a Go wrapper I wrote around a public downloader for Deezer to help clean up the downloaded music (e.g. stripping album version info from the album title, like deluxe edition). For anything I canāt obtain there (and thereās a lot of it), Iām in a certain RED private tracker which almost always has what Iām after.
For the past 2 years, Iāve settled on Spotify (paying for a family account with friends, cuts it down to Ā£2.90/mo each). I donāt really have any issues with their apps; however, their group session implementation is God awful. I love to use it, either if Iām with friends for a barbecue or on a car trip. Unfortunately, it disconnects people randomly and all in all is just a terrible implementation. But as a platform, Spotify really canāt be beaten. Their discoverability is the best Iāve used, though I did have issues for the first 6 months. I listened to a specific artist a bit as a new album had released, and Spotify somehow always found a way to shoehorn that band into the mix of whatever I was listening to. I ended up unliking all of the bandās music in Spotidy for a while which seemed to fix it. I havenāt had the issue since 
I donāt listen to my Plex music library all that often, but itās nice to keep it there since thereās music there that canāt be found publicly anywhere else, and itās all lossless.