I’d theorize it has something to do with whether the separation actually makes sense. Berkshire Hathaway owns separate businesses that have zero to do with each

I’d theorize it has something to do with whether the separation actually makes sense. Berkshire Hathaway owns separate businesses that have zero to do with each other and may spin off or bring in new ones anytime. Sears had different departments of the same store trying to beggar each other which is counterproductive.