> some economies have laws against "in perpetuity" finances. Indeed, but it's a bit different. A will or trust is limited to some period - say 21 years after

> some economies have laws against "in perpetuity" finances. Indeed, but it's a bit different. A will or trust is limited to some period - say 21 years after the latest beneficiary. But there's a difference between a trust with very specific rules, and a general endowment. Doesn't seem to work out the same way. Also, there's a lot of variance in state law. (Side note, did you know that SPY is a trust that will dissolve after certain people die? In the early days of ETFs they didn't... bother figuring out the right legal structure, so they just used a unit investment trust, tied to a dozen or so specific people. So maybe have an exit plan for SPY by like.. 2090-ish, I forget)