The Tesla App allows me to lock, unlock the car, pop and close the trunk, check the cameras, schedule it to warm itself up, input destinations, see its real-time location, and see charging issues.
The app isn't clunky to use. It's wonderful, and it's really well made.
The car's infotainment system is vertically integrated; all of the features are available in one common interface and work well with one another. The car will automatically turn down the fans when I'm on a call, as just one example.
The cameras turn on and show me the blind spots when I'm changing lanes (my only complaint there is that the side-view mirrors do not physically allow me to position them as recommended by NHTSA).
The integrated maps also include charging station availability; and the maps automatically update (I don't need to buy an SD Card from a manufacturer with the updated maps). The software team is able to push updates to my car; so if there are bugs with their bluetooth, it gets fixed without me having to go to the dealership and hoping they care enough about their technology stack to fix it.
If there are bugs, they get fixed; and since they're not dealing with different third-party modules, they own the entire stack that is in the car.
My only complaints are that I can't use Waze on my Tesla, which shows where cops are, and sometimes their navigation routes are wonky and aren't practical (like driving through the middle of DC to avoid going around the beltway), but otherwise the technical experience of owning and operating a tesla an using their infotainment system is lightyears ahead of any other car I've driven.
Contra that with the Volkswagen I just rented where its Carplay crashed and crashed the whole infotainment system; or the bug where its rearview camera stayed on until I manually closed it when I shifted into drive;