Lots of use cases are properly calendars.
E.g. a TV Guide, or a workout plan.
Any time-series of blocks of content.
But the appification of everything means that most calendars are the most generic form of calendar.
A calendar that is good enough for everything and great for nothing.
The lowest common denominator calendar.
This is the defining character of an app-first approach.
What if you could have a calendar display perfectly suited to the particular type of data you were working with?