Cummings was clever at election strategy, but a disaster at governing.
It was always a matter of time, before Johnson with a big Commons majority - would ditch the ERG and Cummings and try to appeal to the centre ground. Because that is his natural lair.
Biden winning has pushed the clock on this. Johnson is no longer tied to the insane Yank. Also he will have an eye on the next election and be fully aware that Starmer could trounce him, if he doesn't drop the hard-line, algorithm-led, right-wing nonsense.
The right of the Tory party are a small faction and with Brexit on the horizon; they will become a much weakened group with very little left to fight for and no electorate to appeal to.