I've got a butterfly bluetooth keyboard paired to my phone that I can fit in a pocket. There's a usefulness to being able to write just about anywhere using only tools that fit in your pocket.

What's the keyboard? I'm intrigued

Mine is this Microsoft Universal Foldable Keyboard: https://www.amazon.com/Microsoft-Universal-Foldable-Keyboard...

Yeah.

https://en.wikipedia.org/wiki/Cell_phone_novel

I personally did a couple of my novel's editing passes on my phone (none of the writing though.)