As always, deep post. Thank you, Justin!

It's a little unsettling. Probably as like everything new. I'm inspired by the new editor. And I understand that themes will now have to fulfill their design role more, than any other functions. However, I have not yet formulated a new role for myself as a theme developer. Providing new themes that include three files: styles, functions and index, and without header, navigation bar, footer. Leave it for the blocks.

Hm... Then, perhaps, will one theme only. And I think I know its name: Tabula Rasa.