Air fryers are only popular because Americans have been using microwaves to cook for decades, which are possibly the worst cooking devices ever created.
If they had decent fan ovens during that time, they wouldn’t be anywhere near as popular
Conversely, air fryers are seen to be popular in the UK, because nobody will admit they fell for the advertising, and now only use them for chips
Do you mean a publican?
A republican can be good or bad, depending on your views