mosespi wrote:2.5A is the recommended supply for the Pi 3 because..
Pi 3.. takes 1.3A
Pi 3 USB ports.. *CAN* take 1.2A
So if you have nothing (or something small) on the USB ports, your requirement now becomes 1.3A for the Pi.
None of this precludes any embedded, battery or driver board applications, I'm not sure why one would think that. Might need a slightly bigger battery or supply/driver, but we also talking about a more capable computer as well.
I didn't say anything about bigger battery. I'm talking about solutions people drafted based on supplying power over a single USB to the board from a hub (such in a pi-top or lapdock solution). In my lapdock solution, it's not a challenge to provide a second source.
In your own words, if the requirement is 1.3 minimum then a single USB source won't suffice.
In my case above, I was using two cables and one of the cables was causing the wifi problems. Replaced the cable and now I don't have wifi issues. Anyone in the same boat and convinced they have enough power supply should ensure their cables are not culprit. Naturally if you are using the official power supply adapter and cable provided, you are good. But in custom builds, you may be drawing off different power sources and most likely using different cabling. Cabling that worked with pi/pi2 but don't assume will work with pi3.