Now that the list of relationships offered when entering a non-autoselected URL is limited to only those that the URL could possibly apply to (that is, all autoselected-only, domain-restricted relationships such as Wikidata and Discogs are filtered out), there's no longer any reason to bundle all sorts of different sites into huge groupings such as "other databases". It seems a lot more useful for data users (a lot easier to filter without having to run text comparisons on the URLs themselves, for once) to have a specific relationship type for each database. The same seems true for most autoselectable sites, except for maybe the ones under "get the music" since it's especially useful to know if they're free/paid and download/physical.