> In-house electronics.

Yes and: Software stack.

(Sandy) Munro has mentioned this a few times.

I struggle to imagine other vehicle mfgs successfully making their own software.

My prediction is that one or more mfgs will adopt Apple's stack. Either thru partnership or licensing. Apple has cash to burn, so I think partnership, eg with Stellantis.

Then they'd also get access to Apple's chips.

As you surely know, legacy cars have dozens of electronic control units (ECUs), whereas Tesla has just a few chips/boards. Those ECUs use bespoke chips. And their supply was recently disrupted. Huge bummer.

Two birds, one stone.