Oh, and the Decomposition Tree has decomposed, since Silverlight is no more.
Microsoft Access Services seems like another dead-man walking. Microsoft PowerApps and Flows along with the Common Data Model are the alternatives being proposed for Access Services. I think that Dynamics could fill a gap here if the licensing costs could come down for custom outside-of-the-box implementations.
The Power Platform is the theme in the April 2019 release notes of Dynamics and Business Applications. Some exciting new changes coming based on those notes.
How about an Enterprise App Store?