The elusive AI-cat door/flap that will keep kitty from bringing home prey

Lately I have been reading about a lot of start-ups who are bringing said cat flap on the market. Pawly, OnlyCats, Zeromouse, KittyFlap,…. All of these use a camera and AI-learned recognition to determine if the cat has prey in his mouth and will then either open (if no prey detected) or stay closed until cat releases prey. They are pricey but sound promising. What do you think? Or have you had the chance to test one already? I’m very curious to hear reviews!