It's clear that autonomous driving can be made to work, because Google/Waymo is doing it. It's hard and expensive and it takes a lot of sensors. It also takes extensive testing. Waymo drives 25,000 autonomous miles a week. Volvo has level 3 working on some freeways in Sweden; their 100 users are not required to watch the road while in auto mode.
There are other startups trying to do it. There's the "fake it til you make it" crowd - Otto and Cruise. (Otto's highly publicized Budweiser truck delivery demo was on a nearly deserted freeway surrounded by chase cars.) There's the "it's just a small matter of software" Tesla approach. There's the "throw machine learning at vision and hope" crowd, some small startups. That's what you get if you take the Udacity course and start coding. 43 companies have California DMV licenses for autonomous vehicle testing.
Toyota has been making some bad business decisions lately. They don't make battery electric cars. (They're fixing that, but won't be shipping until 2022.[1]) Instead, they've been pushing cars that run on hydrogen. Toyota sells the Mirai in California, and has a few hydrogen stations so it can be refueled. They sell about a hundred cars a month.[2]
[1] https://www.reuters.com/article/us-toyota-electric-cars-idUS... [2] http://carsalesbase.com/us-car-sales-data/toyota/toyota-mira...