When is the ML "AI Winter" :-) ?

Pontifications

We will have an ML Winter.
Like the “AI Winter” it will cause a backlash and a decrease in funding.
Maybe when machine learning causes a car to crash and kill folks in a city?
Maybe when expert systems like Alexa, Siri and Google Now fail spectacularly?
I think it’s a question of if not when but hopefully I am wrong.
Machine Learning is better but mainly because of more memory, faster networks and faster CPUs. But it’s not a breakthrough as far as I can tell; it’s still based on 1940s-1960s neural networks and other “AI”.
I’m hoping for a 21st century breakthrough.
In spite of that I think self driving cars powered by machine learning can and will work in dense urban centres.