Not sure about that.

There is a feature request for supporting streaming services and the hurdle is legal more than anything. https://bugs.launchpad.net/mixxx/+bug/938180

That’s a bit orthogonal, though – you can use streaming services when playing live, too.

Yes, sorry, that 2nd part of the comment belonged in another thread here.

It’s not for live mixing only.

Can you point out the nonlinear/non-live features? https://mixxx.org/features/ doesn't do a good job of that.

It is? It has no timeline or automation. Mixx is Tractor alternative. DJ Studio is more like simplified DAW aimed at making mixes/prep for DJing.