Early days so not much usage from people yet I expect.
I can see the overwhelming advantages of divorcing the two things. Also reduces the demand on Revit in terms of having to constantly update the analytical in the background. Not many going to miss those 'Analytical model has been reset' messages I expect. Also sometimes you got stuck in a loop e.g. couldn't finish editing the sketch to floor in a group because one of the similar floors in a different instance of the same group had a shaft at the edge creating a tiny slither of analytical. Also allows you to associate an analytical model with a more diverse range of things and represent such without being limited to what a parametric option allows e.g. form of alignment.
Surprised they made it dependant on Dynamo would have thought they could have a button in Revit for generating the analytical. Couldn't have been the easiest way for them to achieve that but then again perhaps they want you to improve the Dynamo graph where it is lacking.
I have a feeling this will create a kind of arms race in terms of who has the best in-house Dynamo/API solution for generating analytical from physical or the other way around. The default one offered will improve over time from feedback I'm sure.
