I thought the 4x4 grid was an odd choice, especially when calling it the "smallest" font. 5x3 is one fewer pixel of area per character, and about 10x more legible IMO.

Funny enough, I do have a 4x8 pixel RGB display, which frustrates me because I've long thought of 5x3 as the only viable tiny font. I might get more use out of it with this 4x4 font.