My beef with them are three fold.

1. They have been around for a decade and the elderly seem to still have screen terror and freeze up and take forever
2. There are often fewer of these machines and children plug the hole trying one sip of every flavor
3. I’ve thrown out cellphones with faster interfaces than these things and the damn screens get gross after a while if not cleaned constantly

I don’t want my cola mixing with Sprite in the drink cloaca! I just want my fries and greasy burger with a crisp white sprite you damn kids don’t understand!