It used to be an essential service a decade ago but is quickly slipping into a quaint custom. I was surprised to learn that the US had cut back it's service to 5 day delivery just recently! We could easily reduce our delivery to a 4 day cycle and continue incrementally into nonexistence, with of course, the resulting savings.
Vinyl records, betamax,vhs, video rental stores, brick and mortar stores have all learned to their sad demise what Canada Post is in the process of discovery. Change is inevitable! Job are not eternal or guaranteed! Everyone and evrything is disposable!