Brexit is nothing like the millenium bug. The millenium bug was a simple, well defined, programming problem. Many computers had dates set at 2 digits rather than 4 (e.g. 79 rather than 1979 to save memory). A few years before the year 2000 people realised that computers would need the dates in 4 digits otherwise computers would effectively reset themselves to 00 (I.e. 1900). This clearly would cause a number of easily predicted problems so programmers spent a few years making sure they applied a very simple patch to that computer dates were composed of 4 digits.
So, the millenium bug was a well defined, simple, well understood, easy to fix problem with plenty of experts to do the work according to a clear, agreed, implementable strategy.
Brexit, on the other hand, is a messy, complex, poorly understood problem, even by those leading it (Gavin Williamson’s ‘I didn’t realise how important Dover-Calais crossing was’ and David Davis’ ‘We will just make deals with Germany for BMWs and Italy for prosecco’ are just two examples that have us all going WTF?). It is impossible to fix to everyone’s satisfaction because there is still no agreed position even amongst government, Article 50 was triggered with no strategy (this was unforgivable), no experts, and no agreements.
So, the millenium bug is completely different to Brexit, so can we now stop it with the false equivalence? It’s like saying you didn’t feel sick when you ate cheese so you won’t feel sick from eating fish fingers. The two have nothing to do with each other.