Sugesstion to CodeIgniter 4 future documentation

Nice . That's nice page . But I think it will be great to have page about not upgrading project from 3 to 4 but about learning stuff from 4 that's new or has changed from 3. Obviously all documentation is this ;learning stuff; But I mean only... maybe listened nice and clean what is not necessary to read or learn because hasn't changed + anything else is new or changed. That would be good one .