Yes, but the doom merchants were prophesying instant gloom. A massive tax hiking budget to fill some imagined black hole. An instant downturn in production & employment. - These didn't happen.
If you must use such a poor analogy as the man jumping off the roof, then it is "so far so good". But the doom merchants weren't saying he'll kill himself when he hits the ground. They were saying "He'll smash his head open on the parapet before he even gets clear of the roof!"

So far so good. Of course, if a European War kicks off in 2067, someone will say "Oh yes, this was caused by Brexit in 2016. We predicted it at the time."