Thanks for the explanation!

For the defense of git add and the index, I actually personally enjoy it. I discovered git add -p recently, and it's quite nice.

It's like a way to say: let's prepare a commit with only this part of the file, but not yet this one as it's not yet finished.

For example, you can git add -p only the dependencies of a package.json, push that so others have it, and continue working on the scripts part.

I use often as well the index in order to have more granular commits that follows well Conventional Commits, when I want to have a `docs:...` for the readme update and a `feat: ...` for the src change

jj looks interesting, I will take a look!