Reducing the Essential set

This is probably a wild idea, but might be perhaps interesting to explore?

The Essential:yes set poses problems in scenarios where size is limited, or when bootstrapping a distribution.

See also BusterPriorityRequalification.

Some of the packages involved in the boot sequence could be switched from Essential:yes to Important:yes, which has the same effect for apt and frontends, but not for dpkg (although perhaps dpkg should allow but warn about those removals).