He's not leaving them a nickel when he dies either. Interesting side note, he apparently used to be a little more normal about it but his granddaughter did an unflattering segment on him for an ultra wealth documentary and he disowned her for even mentioning the family jewels, especially as a filthy step child https://m.economictimes.com/news/international/us/warren-buffett-disowns-his-grand-daughter-nicole-what-could-have-gone-wrong/amp_articleshow/113204476.cms He always struck me as autistic, but instead of trains it's just Scrooge levels of coveting money. In any event he's completely detached from reality.

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