But Chrome does exactly that. If you put focus in the URL bar in Chrome 69 it shows the full domain including protocol so
amazon.de is visible on focus it's https://www.amazon.de
amazon.de is visible on focus it's https://www.amazon.de
Regardless of how you feel about the change, it does indeed hide 'www.' to the point where a power user could easily be fooled that it was the naked domain.
Edit: Here's a demo of how it works: https://www.useloom.com/share/f7d71b95d75b4c4582bb38cdc84326...