I don’t know how long this will last, but I started doing this recently with Vanguard’s VUSXX (short-term Treasury) fund when I realized it had significantly higher after-tax yield than high-interest savings accounts without the hassle of manually rolling over T-bills, and it looks like many other people have been moving in this direction.
I’m curious about this as well, because the top comment (TNB takes over an existing bank that already has this account) seems like a perfectly viable alternative. Given that they had the resources to get to this point in the first place, was there a reason why this wasn’t an option?