Hi!
It's quite common that Revit gets unsresponsive inside commands. Loading heavy IFC files or while editing geometry and such. You can't cancel what Revit currently is doing.
This gets really frustrating, especially when you're stuck inside an editing mode, such as editing roofs, and you can't cancel what your'e doing and have to force close the software.
A "Cancel all" (force cancel) command would be great. So that you always have the option to cancel what you're doing and sync your work before trying again. You should always have a way to cancel editing, loading and such.
Force closing because of an unresponsive software looses valuable time.