[davidmathers]

I agree with you hypothetically. But my question was about their real world issues.

They could, in theory, have ids for songs-in-playlists. But they don't in fact have them and their RPC api doesn't require them. That's what I'm interested in. Not how they could change their architecture to make REST work.

[AffableSpatula]

if it's a big deal to make that change then their underlying architecture needs a review.