I love how the whole crowd of people that used to be all "what, you don't have a Spotify account?!" Are now starting with the "wait a minute, these guys are domineering and bad!" Like the signals for crowd abuse aren't plain as day.
This exploitative behavior will be down by literally any company that sets themselves up to be "the streets" that you gotta navigate to interact with someone else or their media. That means YouTube, Facebook, and also all those physical places on Earth.
I had a 6 month trial of Spotify for $1 so I thought I'd try it to see if it would help me discover new music. It only has about 70% of the albums in my collection. I wasn't willing to lose 30% of my music so it's back to USB in the car and plexamp everywhere else.
I prefer to use native music app in my car. The same music is on USB. I use the same rsync script to copy media to USB drive and my plex server. I did just have a rental for two months and it had android auto which supported plexamp.
I've got an older car (2012 Mazda 3) but years ago I replaced the radio with a Pioneer one that supports Android Auto. I like it and Plexamp works great on it.