[stavros]

Thank you, this clarifies things. And the changes aren't shown to git clients/GitHub? They just see a bunch of commits?

I should probably use jj at this stage and figure all this out for myself, rather than just read about it. Thank you!

[stouset]

They (and you, unless you go digging) only see the latest commit associated with each change.

The older ones are there in your local repo but they’re invisible unless you need to look through the “obsolete log” to find earlier iterations of changes. This is similar to (and built on, essentially) git’s reflog that holds on to commits that are no longer in active use.

There’s also an “operations log” that, instead of tracking history of individual changes, tracks history of the entire repo. So if you reorder or drop changes, you can always undo those operations.