I've been maintaining a self-hosted music library for so long (30+ years now), there used to not be any tools for editing metadata. I used to have to go into file properties and manually edit the data for each individual MP3 file. Nowadays, I use Mp3tag to manually edit entire albums at a time. I have ADHD though (the hyperfixation kind), so I've literally dedicated thousands of hours to manually fixing metadata.
I guess I never bothered to look for more advanced tools to auto-update metadata. I had to go in and manually fix stuff that updated automatically from the Internet in the past, so I guess I stopped trusting online databases. But they've really advanced since the last time I went searching for tools, and their databases are a lot more complete in this day and age. I'm gonna play around with some of these programs and see how well they work.
I host my music library through Plex, then use Symfonium on my phone if I want to stream my Plex music remotely, just because I like their interface a little better than Plex's.