They should certainly consider keeping him on some sort of retainer for the 2024 general election campaign. Like him or loathe him the guy was a brilliant, invaluable strategist when it came to delivering a yes vote in 2016 (the C4 drama Brexit: The Uncivil War starring Benedict Cumberbatch is worth a watch) and a landslide election win for Boris Johnson last Christmas. Within day to day government though he clearly rattles too many cages. It might turn out to be the right move for the Tories as they govern in a very different environment to the one Cummings would have planned for.