I assert that by the time it's gotten to the point that you have gone out, slogged thru hundreds of job postings, had interviews, negotiated a new position, YOU'RE DONE AT YOUR OLD JOB. And there's no going back.

Something had to have pushed you to do all that work to find a new position; are a few thousand more a year going to fix it?

Never mind you'll forever be marked as the "one who will leave".