An interesting tidbit is that some of the picking processes described in the video I linked to above were implemented only recently as COVID-19 simultaneously applied upward pressure on order volume (people shopping online more) and downward pressure on fulfillment capacity (warehouse worker density restrictions). We literally had to stop taking orders for a short while to keep the backlog of orders reasonable.
It was gratifying to apply things we learned from computer science and industrial engineering together to help us keep up with demand.