That makes sense when you look at the relative numbers yeah. If you look at the absolute numbers you will see that the 1,7% growth of the EU is far far more than the 7% growth of the ermerging markets.
Sorry, I wasn't clear with the point I was making.
You're right - but those figures only apply for the next two years on the IMF forecast. My point is that the relative growth will be very significant in the context of decades. The developing nations will eventually achieve parity (in terms of their potential worth to the UK) with the Eurozone, probably within less time than we've been in the EU already.
Add to that China, the Far East, India and North/Central America will become more accessible (although, as pointed out, no deal yet agreed so this is all potential), all of whom have higher growth rates than the Eurozone (lowest projected growth rate in the developed world barring Japan and Russia, if you're interested - mainly due to poor forecasts for France and Italy).
Nothing is guaranteed and it doesn't address anything around the long term non-economic reasons as to why we shouldn't have voted the way that we did (loss of stature, intangible backlash from Europe, political divergence with our allies - that sort of stuff). But I'm pointing out that if the UK Government and "UK plc" does its job properly then there's no reason to say that we're destined for the toilet of Europe. In fact, there's plenty of reason to be optimistic in the longer term. It's the short term which looks painful.