Great deep dive there Ollie!
And some qualitative feedback after distributing thousands of RPi’s; I can confirm we get our fair share of “undervoltage warnings” that miraculously go away when the official RPi 5.1V Power Supply is used. It’s one of the most common “faults” reported, and no surprise given how often it appears online in other communities.
The overall design (electrically, physically) of the RPI PSU is better suited for power delivery compared to chargers and other 5V options that most people have within arms reach. It will ensure RPi will function fine out of the box, and with as many peripheries as you like, right up to its rated specs without the disappointment of unexpected power issues/warnings.
Such a comprehensive discussion - thanks to everyone for sharing their perspectives!
