A lot of this is more than just "my project", I'm often taking detours to fill in that humungous gap from not having any formal electronic education. I tend to remember things more by doing, than just reading.

I don't NEED 5A yet, I just tend to over-design stuff so that I'm never pushing stuff. Right now I'm probably using 1.5A at the most (I haven't powered 3 LED strips simultaneously yet).

I also am designing the power circuit for future use. I intend to make consoles for many more planes, each more complex and power hungry (servos, relays, etc).

I'm essentially following the capacitor voltage rating rule; a rating 2-3 times higher. (3 x 1.5A = 4.5A)

And yeah, I might just power the "logic" direct off USB.