I’ve never used Mercurial, but a simple one based on the explanations and my experience with Git:

Locating the branch a commit originated from. If a git branch has been merged into (or rebased on) main or another branch, there’s no way to tell which commit came from which branch. But sometimes I’d really like that information to figure out what prompted a certain change. Without it, I need to use external tools like a ticketing system and hope the other developers added in the necessary information.

True, but at that point, every website I’ll ever visit and have visited in the past might be a threat, so that doesn’t really matter too much to me.

I’ve got several hits, but none of them have permission to request my location. If I understand the README correctly, that should mean I’m safe, right?

If you want the magic explained, here’s a start: https://en.wikipedia.org/wiki/Lempel%E2%80%93Ziv%E2%80%93Welch

Hardly a surprise, since Windows 10 didn’t need new hardware to run. You could install it on anything.

Well, what problems are you trying to solve by having the classes all access each other’s data members? Why is that necessary?