Why not? I work for ERP/eCommerce, so this issue happens. But for real, I need to store historical facts anyway ie: In a invoice/order I must store the ship in

Why not? I work for ERP/eCommerce, so this issue happens. But for real, I need to store historical facts anyway ie: In a invoice/order I must store the ship info at the time of the transaction. A artificial ID is useless in a lot of cases where "and if the key change, what?" because if that is an issue, is mostly because the data must retain history, and then, you need to store that anyway. For that, I log the data in a history/log table.