From get go I considered the whole design with no interface on device a bad idea... Apps can and will often go. Better to have also the local controls.

Don't want to remember how much money I spent on a Copengagen wheel for my wife when she was in school. At least some kind souls published a way to unbrick it.

It's a plus from the manufacturer side - kitchen gadgets you keep more than 10 years.

With required smartphone app, it is almost assured to not work in 10 years, and you have to buy another one. Just another method of planned obsolesence.