Like most of my posts, this one is free and reasonably non-technical; my few premium posts have technical content. (Audio version below.)I considered sending this post back in time to make up for the major delay in publishing it – but I hope that readers with a fair degree of foresight will have looked ahead and seen that it was going to be worth waiting for.This is quite a long read – but its implications are rather important. So I hope you’ll stick with it.To hear an audio version of this pos...