I've also stumbled upon Spotizerr but i've had so much problems with it. Usually only getting around 75% of my playlists synced.
I now use onthespot and manually download my playlists once a week. Onthespot also saves a .m3u8 playlist file with absolute paths of the saved music. That way i can just chuck those playlists straigh into my jellyfin and be done.
onthespot needs some tweaking to get it working right. Usually wait 15 seconds between downloads and after around 100 downloaded songs it starts to fail every other song.
I just let it run through and the start the download process for the whole playlist again - it skips all already existing ones and after two or three runs i have everything updated again.
I have the fortune to be of the "Lan-party" generation and still have a big group of people i know keep ageold games, movies, etc.
So if i need something i can usually get it from them... then it's a matter of VPN into their network and use ftp.
But usually i don't really look for old stuff. But thats a "me" thing. I know this will not work for everyone... also, yeah despite the retention being "only" 13 years, i do find stuff that got reupload quite usually.
I am searching for very old audiobooks and i still find most of them on usenet despite some of them being well over 20 years old now.
Speed is unfathomably fast though. I have a 1gbit/s connection at home and i can download with ~900 mbit/s through the VPN
That's why i feel much more safe using Usenet.
Also, the fractured nature of usenet makes it more resilient to prosecutors to actually pinpoint anything.
Found it on "Kleinanzeigen" which is basically german craigslist or facebook marketplace and i am so happy about it.
I use the knob all the time and it feels so good
This wont happen on linux