or where the benefits are murky
Ah, yes. The benefits, elusive (and illusive) though they may be. "Controlling" your fridge or your thermostat from far away via your cellphone. Useful? Hardly at all. Cool and shiny? Sure, that's why people buy them. You need almost none of this. You don't even need a "food processor," unless you have to prepare food for more than 4 or 5 people. A set of decent knives and cutting boards will do just fine.
Just be realistic and recognize that if you buy kitchen gizmos it is because you are a gadget freak, not because they serve any compelling useful purpose. They are, by and large, paraphernalia, not tools.