What common coating do both modern ceramic and stainless steel cookware represent a departure from?

Answer

PTFE-based non-stick surfaces

Both ceramic and stainless steel cookware are viewed positively as significant departures from traditional non-stick surfaces based on PTFE chemistry, which are linked to off-gassing concerns when overheated.

What common coating do both modern ceramic and stainless steel cookware represent a departure from?
healthcookingceramicstainless steelcookware