It is unusual. I'd even go as far as to say that it is an awful and stupid decision to do this at a time when USB-PD operating at higher voltages is finally be

It is unusual. I'd even go as far as to say that it is an awful and stupid decision to do this at a time when USB-PD operating at higher voltages is finally becoming somewhat commonplace (common, as in: we might have extra junk laying around that can do it), but I'm not trying to make 90,000 widgets per month and build them down to a price. But a casual Google search where I am located at least two alternative suppliers that are already shipping appropriate power supplies that can do 5@5. And the usual (US) distributors (places like Adafruit and also places like Digikey) are selling the official power supply for $12, which I personally consider to be very cheap. --- And remember, wanting peculiar power supplies is normal in the RPi space. The very popular Pi 3 was weird (5.1V@2.5A over MicroUSB, with many unofficial recommendations suggesting 3A), for instance -- in a world where common "high-power" USB power bricks topped out at 5.0V@2.4A on a good day, with the wind from the South, and under the direction of an unladen sparrow. Many of us are familiar with the struggles that this entailed as we worked on whatever we were working on. But other suppliers did come to the front and offer alternative products that reliably delivered 5.1V@3A, and there's no indication that this won't be the case for this round as well -- especially if they're able to produce the quantity of RPi5s that they say they will. At a projected 90k units per month, then: Every 7 seconds, an opportunity to sell another RPi5 power supply opens up. (The Pi 4 has a different version of the same story.)