Yes but neither company has a competitor to the Model S, Y, or 3, which I believe are far and away the most popular models. Until there is legit competition in that space, Tesla will probably remain stable. More companies are getting there but it’s been very slow going.

What is the benefit? What improvement does it offer? What is the point of introducing a weakness and simultaneous single point failure in exchange for a phone with a smaller, less durable screen, has a fatter form factor, and makes it more difficult to use to do all the things I actually use my phone for?

Flip phones existed as a way to easily answer and end calls. They went away when touch screens became a more convenient and versatile means of using a device. Nobody talks on the phone anymore. I don’t even have my phone app on my home screen.