I'm familiar with this strategy but there's one thing about it that I don't understand: After death, the loans are an estate liability, right? Doesn't the estate need to be settled before heirs get their inheritance? If i had an outstanding $1MM loan, wouldn't the estate need to liquidate some of that $RIVN at the $67 basis in order to pay the loan? and then whatever $RIVN was left over would go to the heirs at a stepped-up basis?

The step up in basis happens when you die, so the estate has no capital gain. Then the debts are paid, then the heirs get whatever they're supposed to get.

I conflated the two, since it all happens pretty quickly, but the estate is actually the recipient of the updated basis. So the estate sells @ current price, pays the negligible difference on gains from appreciation while the estate settles, if any happened, and then passes out the rest.