Which came first though - the ratio or the designs?
The Golden Ratio is applied to buildings, paintings, nature etc. throughout history, throughout civilistations, civilsations that never met each other prior (probably).
One of the oldest pyramids in the world is in Peru, built around the same time as the Egyptians.
Makes you wonder. How did civilisations across the globe have the same notions on design and ratios? And no, not Ancient Aliens.
People are smart, engineering principles haven’t really evolved that much, just machines are more capable.
However, I digress, what I mean to say is that these ratios and universal principles of design have been passed down from generation to generation - they are nothing new, and simply guidelines on good proportional design.
Do designers follow it? I don’t follow, at least consciously, I never studied it, never had a need for it really. Yet 25 years later, I am still a designer and getting good feedback.
Is it worth following??? I don’t know, you certainly can, but I wouldn’t waste too much of my time trying to fit it in.