Serious question: What is the percentage of people intending to get re-hired at a previous place? Or at least definitely not rejecting that idea?
Personally, i have never done so, be it because was always leaving by a "voluntary" "termination agreement", and the employers involved being either not attractive, not existent, or plainly incompetent. If you are residing in a major city, there are always other options.
And given 100% remote seems to be a must for many people, even more so.