While I really like the Gutenberg experience, I have recently split my writing and publishing processes. It's quite nice to be able to write offline (in Atom or VS Code as others have suggested, though I've recently discovered Notable) without worrying about how I am going to typeset this or align that.

The two things — writing & publishing — require different mindsets and it would be great if the the tools we use are aware of that context. A change that would bring us closer to that reality (Micropub already does a little) would be welcome!