I think it's an extra layer on top of things i do not need. I do not need cover art, descriptions or trailers. The smb shares have a folder hierarchy that's very logical and easy to our household so sorting and reindexing is not needed. Kodi (Windows,Linux, Android) keeps track of where i was, but i don't really care that much. Usually i remember what i was watching. File Explorer Pro (paid version) on IOS plays anything. I do not need transcoding, because all the players can play anything i throw at it. My wife and kids know how to use Kodi both on the pcs and the chromecasts.
Mp3's go to a Sonos at the moment. If more mp3 devices would be needed in the future, i'm kinda curious about the CrowdSupply Esparagus systems [1][2]
1: https://www.crowdsupply.com/sonocotta/esparagus-media-center 2: https://www.crowdsupply.com/sonocotta/esparagus-audio-brick