Some people are saying that he will perform a useful function, demonstrating Tory destructiveness to people who have forgotten what it is like to be ruled by the far right. I hope so. Thatcher was elected just in time to benefit from the North Sea oil money coming into the system. There will be no such fortuitous natural bonanza to cushion the impact of Boris. This may make his failure quicker and starker.
*Annoyingly I can't find that link now