The UK’s exit from the EU is not unimaginable. The rest of the EU would get over it. Let me reassure my German friends . An independent UK would want to let German carry on selling all the goods to us they currently sell.
As the German Finance Minister wisely said when he could imagine the UK’s exit, Germany would want a trade agreement with the UK on exit. As the minority in the UK who want to stay in only ever argue about the need to preserve the trade, they should accept that it is in the rest of the EU’s interest to do just this!