Wouldn’t it be simpler to just dev locally and then rsync the files?

It actually is, you can’t run a desktop enviroment with it for example but it does let you open linux gui apps to be used from windows.

I don’t know much about wsl but they probably want to develop on headless linux why still being able to use GUI Emacs.

Don’t. Its a black hole and your ROI will be negative.

What does this book offer over the built-in manuals?

Good job. One big downside I see is that you can’t see existing tags when creating a new note, one doesn’t want to remember all tag names each time you create a note.

Which points to the grep command, so what really needs to be customize is grep-command no?

After disabling evil, the emacs “leader” key is C-c instead of Space.