> suggestions for ingredient substitutions (if they’re good, which is the crucial part!) would be a really useful feature for me

Can't they implement this feature without any gen AI? OK, the answer is that they don't want to pay someone for making a list of substitutions, but at least they can generate it and make a human cook revise the results. There is no need for calling gen AI APIs when the app is running.

People are shoving gen AI everywhere out of the hype, including tasks that have better, more reliable solutions with traditional approaches.