In the UK, prime is next day delivery, and this "feature" has been annoying the hell out of me for months now. The number of times I've ordered something that says "order in the next X hours to get next day delivery", gone right through the checkout with every step telling me it'll arrive tomorrow, only for tomorrow to come and go and my package to turn up some days later. We don't even get emails about shipping date adjustments here, they just straight up lie to you.
