>>21430477>one of the most inert substances known to manretard alert
Microwaves are mostly enamelled steel or stainless steel interiors though
I've come to the same conclusion as OP, you can't buy stainless buckets for airfryers and the internals are mostly some random chink plastic, it doesn't seem worth the risk when you can use an oven or just buy a fan forced toaster oven for the same price.
The only non-stick I have is for cooking eggs, and even then I basically turn it off not long after the eggs go in, put a lid on and let the latent heat cook it