For those of you who follow basketball, let me use an
analogy: George Karl was the coach of the Seattle Supersonics.
They always had a winning record every year, but they never
actually won a championship, and, finally, Seattle got rid of him.
In this situation, if you’ve got a principal who’s done an okay
job but, at some point, the local school council determines, “You
know what? We think that there’s another candidate who can take
us to the next level”, under that standard, as long as they can
document that it was a reasonable choice, then that is going to be
okay.

That rhetoric was said on May 27, 1999, if you care, and there’s some transcripts here.