The article is not optimistic on flying cars. The prediction is that an expensive flying car could be purchased no earlier than 2036, and notes a strong possibility that it won’t even happen by 2050. Plus states that minor success (aka 0.1% of car sales are flying cars) isn’t going to happen in his lifetime.

The author also expands on this:

> Don’t hold your breath. They are not here. They are not coming soon.

> Nothing has changed. Billions of dollars have been spent on this fantasy of personal flying cars. It is just that, a fantasy, largely fueled by spending by billionaires.

It’s worth actually reading the article before trashing someone’s career and engineering skills!