How on earth does that work in an Airbnb? Or like, even my house guests? Do my parents and housekeeper and who knows who else all need to be set up with the Bosch app to be able to function in my kitchen?

It barely works if you're two adults in a home. Half of all the smart appliances can only be linked to one device. Sorry honey, I couldn't do the dishes or the laundry, the machines are linked to your Bosch account.