“Enough” is likely the key word. But if you have business or personal accounts with over a couple million (and certainly $10+ million), I would be shocked if someone higher up than a clerk hadn’t personally reached out to you, tried to take you out to coffee, and let you know the perks applicable to your personal situation they can provide you that you can’t find on a website.
Sure, they likely weren’t as enticing as SVB’s perks nor as willing to lend to an account that had $0 yesterday and millions the next, but they absolutely will offer personal loans/mortgages against stock compensation on the guarantee you keep your account with them above a certain threshold, etc.
There are plenty of ways to get you in the conversational door like offering a better rate or to help protect the account.
Eventually someone from hashicorp "...notices we have ~$35M sitting in cash in a Chase bank account. This is obviously not a smart thing to do, so he suggests some financial plans for how to better safeguard and utilize this mountain of cash". The bank could have been the party to preemptively explain this to the author, and if they did they might have been able to be a part of the solution (or at least try to negotiate for it) instead of losing the entire account.
It sounds like the bank manager was being too delicate, asking the author if they had any banking needs when he didn't really think he had any. They should have been more blunt and said look dude you have a ton of money in here, you're probably not used to managing this amount of money, we need to take just a bit of time to discuss it and we'll make it easy and worth your while.