[1] https://www.zdnet.com/article/amazon-dominates-holiday-shopp...
Amazon Prime? I'd feel very confident in their estimates. They are almost always bang on. They're doing an amazing job with their supply chain management.
This actively changes how I will do my shopping; either somewhere online for in-store physical pickup, or Amazon.
#) I've given him meaningful stuff throughout the year, and hate that I have to come up with something for this fixed date as is the tradition
If a few AusPost drivers call in sick, your package is one day late. If your Prime last-mine Flex driver doesn't show, the app texts other Flex workers with ever-escalating payments for the 'block' until someone accepts (as much as ~A$60-80/hour gross if it gets that high).