For me, being able to go straight from a selection in a code file to a log of all changes to that specific code, which I can then filter further, is what gets the strongest reactions from my coworkers.
What?! How do you do this? I love magic but haven't discovered this.
TIL magit-log-buffer-file...
It's unfortunately hidden because it has no default keybinding iirc, but I love this feature. I think I discovered it by wondering if it exists, so I searched through the M-x candidates with orderless and typed in terms that I guessed could be part of the right name.
C-c M-g l gets you there. (C-c M-g leads to a submenu that also has blame.)
Until this thread I didn't know it could also do regions.
WHAT!? You can use M-x magit-log-buffer-file with an active selection and see only the changes to the selected portion? This is so obvious in hindsight and so cool... Thanks a million!