Several times, sometimes to find out when an incompatibility was introduced in an upstream dependency to find the maximum compatible version, but usually to find the commit that introduced a strange bug.
The process is always the same… Write a unit test, start bisect, check test select next bisect step, repeat. If your last-known-good and first-known-bad are correct, it always worked for me.
Elon Musk supports eliminating rights for people who aren’t Elon Musk… That’s about it, I think…