Mechanically speaking, a hybrid has all the complexity of gas and electric combined, except for the transmission.

My 2019 Hyundai Kona EV Limited is pretty simple: front wheel drive, power windows, locks, and driver seat but everything else is manual (mirrors, door handles, hatch.) No navigation system but supports CarPlay and Android Auto, lots of physical knobs and buttons.

I let Blue Link expire and hardly noticed a difference. There is no setting to disable the cell radio, but presumably you could open it up and ground the antenna or something.