Suggested songs smart playlist
in the old days, Amarok used to have the very nice feature of "Last.fm suggested songs playlist", where it populated a playlist continously, based on Last.fm's "suggested songs". This created a very good playlist from your library, based on audioscrobble database statistics.
It was implemented in Amarok 1.2, and then changed in Amarok 1.3 to "Dynamic mode"
This is discussed in this post from 12 years ago from the Amarok 1.x scripts page.
It could be used the Last.fm API: track.getSimilar, given that the API is already implemented in Strawberry.
I never understood why this feature was removed from Amarok... it is like the Genius playlists from iTunes.