Updated: Comment 0
Problem/Motivation
Comment entity statistics view plugins are broken and there's no tests.
They are not properly ported to interact with entities other then nodes.
There's no way to detect the name of the "changed" field for entities that implements EntityChangedInterface
Proposed resolution
Probably needs to check that commented entity type implements \Drupal\Core\Entity\EntityChangedInterface and expose this field only for this entity types
Remaining tasks
Fix views integration with comment statistics and cover with tests.