It is a bit nuts. We've had overnight or same day delivery for a bit now but the amount of things that qualify are just expanding rapidly - especially from when I quit Prime last year and signed up again last month.
Ordered an Fnatic/Lamzu mouse last Thursday at like 9pm, it got delivered at 8am on Friday. In time for the weekend gaming sessions. I've had a few same day deliveries and a few overnight, then a ton of next day deliveries. Where Amazon logistics has been deployed extensively, it's bonkers.
The same day or overnight deliveries often just come with a guy driving a regular sedan, probably their car, filled with boxes in the back seat and probably trunk.