Back when Brexit was not yet the reality of the matter, a lot of hot-headed EU fanatics in other countries would not shut up for two seconds about their doomsday predictions of how everything would go wrong and the UK would stagnate beyond recognition. I am not using strong expressions because I would be pro-Brexit or would even have stakes in the matter. I was just simply astonished at the strength of their conviction, and I could not see what evidence there was. We have not seen a country leave the EU and be reduced to a pile of rubble (or the contrary), but there are many countries that have never been members of the EU and are doing quite well.
So how is it now? Are there any positive or negative things that can be isolated from the ups and downs of general human or economical trends and can be said to be the result of that decision?