What information about the page is useful to add to the body in the form of classes?

Question

Drupal

I remember when I worked with wordpress there was a useful feature that classes like page-id-18 page-alias-about-us were automatically added to the body element logined
now a custom project on
symphony I am writing a twig-helper to do this
I want to add route-name page- items id-18 page-alias-about-us logined advise what else is useful to add, for later simplification of styling

Answer 1

Don't pre-add, just in case. If you need it, then add it. Is it easy?..

Answer 2

Add the page template slug. It will be convenient to edit css for specific templates.

Answer 3

A bunch of classes that are not used is also not the best choice. Try to add as few classes as you really need.
PS And here Drupal?