> Respinning a board isn't too difficult, but good luck doing that if there's no chip to respin it for.

Some people hoard toilet paper, some people hoard baby formula, some people hoard Shanghai apartments, some people hoard microchips...

Got burned with same STM32s recently. A purchaser been shopping parts, and ordered a given model of MCU by muscle memory. The price has moved one zero overnight, and we ran for quite a sum.