I'm finally done as well. I'm running my Plex server on a Synology DS218+. Scanning everything took about 5/6 days. Now I see 'Sonically similar artists' and 'Mixes for you'. I think this feature is really nice, since a lot of the time similar artists based on tags were missing or just not sonically very similar at all. I mean a band like Ulver started playing black-metal in the 90's but evolved playing a lot of different kind of genres during the last two decades. Still, they have always been tagged to the scene they started in, which meant Ulver Radio was always music unrelated to what I was playing. I like my black-metal, but not when I want to listen to electronic music. This new feature will at least solve my first world problem.