I currently have Spectralayers 12 and primarily use it for unmixing songs. Are there features that make using Spectralayers within cubase better than exporting the stems and putting them in another Daw?
SpectraLayers is fully integrated into Cubase via ARA2, so it’s available as an editor in the lower zone of the project, and obviously you have the full power of SpectraLayers spectral editing available within that. You can also drag-and-drop layers from the SpectraLayers lower zone into the project to create new tracks – including separation layers.
I genuinely can not think of any reason to need any other DAW with SpectraLayers, given the tight integration with Cubase. On the other hand, if your only focus is on stem separation, then you can of course use any other DAW in your process. Note that Cubase 15 has added basic stem separation as a feature, without the need for SpectraLayers, with less quality, while being much faster.