I think the target audience for a Toyota or Honda (boring but reliable car) isn't very interested in the kind of quality control Tesla has. They're supposed to make up for that in other features and the unique style of the truck is part of that, in theory.
IMHO, Toyota did an awesome job of taking the 2004 Prius funny wedge compact eco-nerd-mobile look (which might have been exactly what it needed at the time), and making it look sleek and modern and powerful.
I'm imagining a designer looking at the earlier windshield slant, and knowing they could work with that, and retain references to the iconic earlier design.
The people I see with Model 3 and Y are the ones who came from Camrys and Rav4.
Tesla EVs have the most data to support their reliability (at least the 3/Y), and they are clearly very reliable. Plus it costs just as much as a Rav 4, but has tons more torque. And the software is much better even though it lacks Carplay.
I thought that too, and then Toyota wanted $15 per month for remote start and made it seem like they were doing me a favor when I went to buy a car, so I ended up with a Tesla. Ended up not missing Carplay, and it cost $20k less for a car that seats 5 adults and 2 kids.