British intelligence dropped its plans to assassinate Hitler because a drugged, malfunctioning Hitler was better for Britain than whoever would replace him.

German writer and journalist

And I spoke with Anthony Beevor once about the attempt of British intelligence to assassinate Hitler, and he had seen some evidence that at the point in time, they dropped those plans because they knew that drugged Hitler or malfunctioning Hitler, which he was after, you know, the summer of 1943, is better for Britain than, you know, killing Hitler and then having to deal with, like, some kind of, you know, maybe the army would have taken over the country