Thanks for this. This is fairly old now though, and doesn't even mention bookmarks (which I understand to be like git branches, except they aren't (?) synched between repo copies. Then there's some new stuff that apparently are very good, but I can't find a proper description of how they work / should be used.

> This is fairly old now though, and doesn't even mention bookmarks.

What do you mean? It has a section on it:

https://stevelosh.com/blog/2009/08/a-guide-to-branching-in-m...

(I have not audited to see how accurate the information is, though).

> Then there's some new stuff that apparently are very good, but I can't find a proper description of how they work / should be used.

Yes - I often wished that someone wrote and maintained an article listing all the extensions that one likely will want to use.[1] One you may want to look into is evolve.

[1] Maybe someone has written this - I haven't checked in the last few years.

Ah my bad, missed it, you’re right.