To me it is not so much a question of the relative benefits of Cubase vs. Dorico. Of course Cubase beats Dorico hands down as recording, mixing and playback platform. But for me it is more a matter of which type of platform do I feel more comfortable working on composition, a DAW piano roll or notation. In this regard notation wins hands down…for me, not necessarily for others. Therefore for me as Dorico has over the last several versions begun to come into it’s own as a composing platform using VST’s, it has caused me to increasingly leave Cubase behind.
As others have said above, the last few Cubase versions have been oriented to a different market than orchestral composers and arrangers. I stopped upgrading after Cubase 9.5, but I’ve purchased every Dorico upgrade. I plan to continue this path as the platform matures.