They’d honestly probably hate it. Ultra processed foods are disgusting if you’re not used to them, there’s a gross kinda chemically undertone to the flavor that sticks to your tongue. Normally it’s covered up by making your taste buds overload, but new tastes stand out. It helps develop aversions if we get food poisoning from trying new foods

They’d also be going from never tasting spices before to total overload. A lot of them would react like people do to tear gas

Now, if they powered through and kept eating they’d probably get addicted, but it would be an acquired taste