I've been in this field a long time, mostly on the figurative and sculptural side, but over the years stumbled upon a few simple origami mechanisms that seem to have been overlooked---ideas that someone a hundred years ago really should have thought of, but missed. The tree turns out not to have been picked entirely clean, and it fell to my lot to find a few fruit still in good condition.
Most of these mechanisms I've written about here on this Blog at the moment of discovery, but not all. You can see these 3 - 4 concepts in the (slightly longish) video below. I showed all of these at the Sculptural Origami Gathering in Innsbruck in 2023 and now there's only one idea of equivalent stature, also from about a decade ago, to disclose at the upcoming SOG in Tokyo.
Soon, perhaps we'll have more to discuss ...
Cheers!
Saadya
Saadya Sternberg Mechanical and Geometric Origami Discoveries