I really liked the dash buttons for two reasons:
1. It made ordering something you regularly and only buy online anyway easy for an entire household, like for my use case, hookah coals roughly every month.
2. You could place the button next to where you store said consumable and most folks would prefer using it over asking for a link or reminding someone else to re-order.
I do think it was a mistake to launch with an initial limited set of branded buttons for common household goods most people pickup at the store anyway (like detergent) instead of a generic button for my point 1's usecase but thats just plain-old BigTech thinking.