> Yeah it's sure useful when I bisect and find that commit Joe Coder made at the end of the day called "End of day. Tests not passing".

So your automated bisect tells you to look at two whole commits instead of one. Big deal.

If you keep history as-is, most commits will compile and pass tests because coders tend to compile and run tests as part of their work cycle (and the occasional isolated non-compiling or non-test-passing commit isn't a problem for a bisect). If you rebase you will end up with long chains of commits that don't compile unless you have some additional mechanism to prevent that.