The two scenarios: 1) handing a business your life savings to manage, a 2) authorizing a company to manage your finances so they're in FDIC insured accounts

Are completely different. There's no laws to update, and the FDIC isn't skittering out of paying on a technicality.

And, frankly, if anybody reading this is looking at option #2- do yourself a favor and get an accountant and a wealth manager that both have fiduciary duties. Might as well find a lawyer as well.