In reply to Piet.

Piet,

I think you could be right.

Looking at the themes I use, I see that I am already removing a ton of stuff from the WP head and the Customizer, removing the WP version from scripts, CSS and RSS and the admin footer, removing injected CSS from the comments and gallery, and, of course, removing Howdy. And, on install, I had to remove Hello Dolly!