Most brokers (A.K.A. wealth managers, but they are really glorified salesmen) at "full service" brokerages like Morgan Stanley, Goldman, JPM, etc generally hate Berkshire because they can't make money churning the account. I used to work with one of them and I got rid of them (and moved my account to a discount broker) after I started buying Berkshire stock 22+ years ago.
I also think in the last 20 years, Berkshire roughly matched the S&P 500 index. So if one doesn't want to do any work on which stocks to buy & hold, she would have done just fine buying & holding the index (case in point: Astrid's portfolio as described by Warren).
I think Berkshire is likely to just match the index results over the next 10-20 years. But I prefer holding Berkshire as opposed to the index even if that's the case. I like the culture, deep focus on risk, treatment of shareholders as true partners, no stock options for management, managers buying Berkshire stock in the open market like their fellow shareholders, and everything else at Berkshire.