Seems like a big deal for typesetting books.

https://webdesign.tutsplus.com/tutorials/better-css-drop-caps-with-initial-letter--cms-26350

https://twitter.com/jensimmons/status/975952839657783297

That should greatly simplify matters for the production of illuminated manuscripts with HTML and CSS.

Conveniently enough, there's a spec:

https://drafts.csswg.org/css-inline/#initial-letter-styling

And the editor is a Prince user