Default backspace, layer for carriage return.

"I want to avoid diving into different layers because I type so much and often have to reframe and contextualize my prose."

Then why did you build a minimalist board? Sounds like you're trying to force an ok tool at doing something that a different tool would excel at.

Idk. I've used tons of programs where you have to use shift+return to get a carriage return, and the. Crtl+return to submit your entry. It's not as bad as you think.

Also, if you don't ever make a mistake typing, you never have to use your fn+enter to delete something. It would force you to get really good putting your thoughts to text.

Also, I generally only use one of the shift keys. So I would consider using the other one for an enter.

Why not use the enter key for both a backspace and a carnage return?