Re: Transition Period?
Well, Boris is supposed to be dead in a ditch, but that didn't happen either. Being a bit late on another self-imposed deadline will be forgotten by the next election. A "unmanaged no deal" comes with all sorts of risks that won't be forgotten, even if it's just a national shortage of avocados... and if it's toilet paper it'll be remembered a loooong time.
Boris has, rather annoyingly, proven that he is very good at (his personal) long-term strategy. Getting a second term is probably in that strategy.