Once the opponent is politically dead, they move on to the next conservative. No sense wasting resources on a former opponent who has left the scene and is forgotten. It may be that we are moving on to the next stage, the one that Stalin and others carried out by actually physically killing their opponents. That remains to be seen, but for now “death” is simply political annihilation.
I still think they will make a blatent “example” of her by continuing to ruin her life. Remember, she still has considerable standing with the Conservative base and her future political ambitions are...unclear. Time will tell.