ArcCatalog is a necessary tool for data management in the esri ecosystem, but a tool that users cannot make maps with or do spatial analysis.. Suggest to decouple it from ArcGIS Desktop and make it freely available to anyone. This would help Pro users with data management while also still serving current ArcGIS Desktop community.
ArcCatalog should remain extensible to anyone wanting to build tools to enrich the tool for either Desktop or Pro.