From TFA: "During the Starfish Prime nuclear test there were just 22 active satellites in orbit", so ~ 7.

Yeah, but it was an Area of Effect type damage. The radiation formed belts. It’d affect the same area now, just more satellites.

Isn't LEO a defined set of parameters? Read: finite space. So, it wasn't that populated. Now? Oh buddy.

Numbers are funny without contextualization. Far more potential impact today while dropping the scary fraction