Purchasing Multiple Items
It is something they consider and are probably working on. We just gotta wait until they implement it.
A lot of “things that should have been there since launch” are not there yet. It’s unfortunate but we gotta deal with it for the time being.
Just take the “drinks” achievement in consideration. I need thousands if not ten thousands of drinks. Buying them 1 at a time made me stop after a while. I’m now waiting for a stack buying option.