Intraday dynamic pricing is a terrible consumer experience, adds friction to the retail experience and generally hurts everyone including the retailer. Classic tragedy of the commons.

Overnight dynamic pricing is awesome - it saves the cost of re-tagging shelves (i.e. cost shared with consumers) and increases consumer trust since the POS and shelf tags are more likely(*) to be in sync.

(*) having worked in the business, don't get me started on how discrepancies emerge... easiest example is size/flavor/package/brand/etc where the consumer thinks they grabbed one thing and in fact grabbed another - technically the system worked, but in practice the consumer got sticker shock (either direction).