Not really, I think people who are silly enough to quit their jobs over a free vaccine are hopefuly in a small enough (but unfortunately very visible) minority that this isn't a huge factor. I may be wrong, though.

Unlikely. JPM and Citi are about to let quite few go, about 3% of workforce, due to Anti-vaccination recalitrance. While 3% feels like a lot, it's less than great resig.

No, mandatory vaccination triggered the "Great Self-Dismissal of Fanatical Antisocial Psychopathic Science-Denying Anti-Vax Menaces to Society and Dangers to Themselves and Others", not the "Great Resignation".

Many of them go on to overcrowd the ICUs and morgues, so they are actually unwittingly doing their former employers and co-workers and evolution itself a huge favor by resigning and letting natural selection take its course, to smugly "own the libs".

It's kind of like Mitt Romney's idea of "Self Deportation", but for Trump supporters and gullible Fox News suckers instead of immigrants, and they're self-deporting themselves from the Earth, not just the USA.

Considering the majority of people quitting are in places that have no mandatory vaccinations (service sector in general), it's mostly a negligible factor.

In specific industries it might be a somewhat larger factor (health care I do think is more significant, for example). But even in those industries, there's far greater effects leading to people quitting, like quitting to become a traveling nurse and making 3x the pay, or just getting burnt out from the demands of the pandemic.

The Great Resignation was already in full force before any vaccine mandates were even in place, also.

No, most people are not sociopaths and are happy to get vaccinated to protect themselves and their community.

For the places that have enforced mandatory vaccination, it seems to end up around ~1% or so of employees that are willing to go that route. And frankly, a substantial number of those are older workers that are probably at retirement age anyway. The "Great Resignation" is much more substantial.