These EVs are all reliant and dependent on the OEM via their OTA/4g/5g/wifi requirements.
This is not an issue confined to EVs, it applies to most modern vehicles no matter the drivetrain.
For me the convenience it provides it excellent. Similar to our home energy systems.
The full data set is all but impossible to display on one screen but includes status of doors, windows, boot, bonnet, and all locks, aircon, charging, front and rear defrosters, auxilliary (12V) battery, exterior and interior temperatures, main and high beam, heading and location, tyre pressures for each wheel, vehicle running/not running on/off, speed, state of charge % and kWh, range, drive battery voltage, current and power, charger plugged in or not, whether charging or not, target charge level, charge current limit, scheduled charging settings (on/off and start, stop times).
Most are data supply only, but many items are controllable (e.g. locks, aircon, defrosters, charging settings etc).
I built a phone dashboard for my car.
I could add the defroster controls but we don't need that much here, more the ability to pre-cool the car if parked out in the sun for some reason (normally in the garage at home).
If you want low tech reliability, it's hard to beat a bicycle. Mind you modern ones are so laden with electronic gizmos it's a bit insane. My bicycles have had power meters for 20 years.