I can't believe this hasn't migrated from the Get Satisfaction site - Spotify is in dire need of Smart Playlists. iTunes and Media Monkey have hgihly intelligent smart playlist functions, which is great for offlining big playlists in a useful way. I, for example, have a huge starred playlist which I simply can't offline without seriously compromising the speed of my iPhone and more particularly, the Spotify app. If I could restrict it to 100 random songs that I haven't played in the last 6 months, then I could just sync nightly, and listen to a selection of my favorite songs, without causing performance issues. Currently, I have to create playlists manually using Spotibot with my Last.fm loved tracks, which is hassle.
Updated on 2020-11-03
Thank you for your feedback on this idea.
We're setting this idea to 'Closed', as this isn't something we have any immediate plans to implement.
If anything changes, rest assured we will return with an update.