Many journalists and social media experts are surprised that Elon Musk would go into a business that he doesn't understand and refuse to listen to anyone who does. But we who work in urban transport planning already knew this about him. https://humantransit.org/2018/12/elon-musks-tunnel-it-doesnt-scale-so-it-doesnt-matter.html
Elon Musk's Tunnel: It Doesn't Scale, so it Doesn't Matter — Human Transit

Elon Musk just gave the media a tour of his 1.5 mile prototype tunnel under Los Angeles, which he spent US$10m to build.  Why are Elon Musk’s tunnels so cheap?  Because they’re tiny. As media photos of the event will show you, the tunnel is just slightly wider than a car.  That means that if […]

Human Transit
@humantransit To be fair, he has now admitted that hyperloop was a ploy to kill California high-speed rail. Whatever else you can say about the Twitter purchase, it wasn't a ploy to kill Mastodon.

@BenRossTransit @humantransit I'm doubtful it was actually a ploy. Claiming that his impossible to build and very flawed concept was actually a genius plan to trick everyone fits the image he wants to show. But there are too many examples of him pushing forward with silly ideas without consulting experts. Eg. that child submarine.

Before he was forced to buy Twitter he tried to pull out of the deal claiming it was a genius ploy to sneak a look at Twitter's internals.