Boy am I am ever out of step. The one page he nicks wholesale is the one page I’m really hoping Dorico is going to redesign. 
Given the extent of his involvement - I’ve found MuseScore / Keary videos going back 6 months before he reviewed Dorico - in hindsight I think he shouldn’t have made the Dorico video and certainly shouldn’t go ahead with a Finale one. I can’t imagine any of his competitors ever doing that to him.
That said, it’s a free program, they appear to have done a lot of work with users - I’m interested to see how that turns out - and I’m all for a notation software market where competition is driving things forward. Given the richness of Dorico’s functionality I can’t imagine I’ll be joining in, but I will keep a quiet watch.