Not yet proven. Cancers from such stuff turn up decades later. When it comes to carcinogens, trace levels is all that’s needed to mutate a few cells. Statistically low yes, but the risk is there.
The vapour toxicity on birds though still makes me concerned. Sure, not toxic to humans, but breathing in that stuff is not natural and long term effects are unknown.
Noting there’s a huge interest in the industry in not proving a link. Not that I’m normally a conspiracy theorist.
I’d rather avoid it to be safe rather than find I’ve been using the stuff for years and then bang here’s a new study with proof and too late I’m screwed.
Besides that, there’s still the fact that ceramic can take much higher heat. Teflon pans shouldn’t be used for high heat cooking, as per manufacturer instructions (they claim durability issues).