Well I’m going to go the old curmudgeon route…
In the beginning, in the US, there were three types of riding pants. Breeches, which were meant to be worn under tall boots, stopped just below the calf.
English jodphurs were worn by hunt seat riders, mostly by children, but also by adults, especially beginners and those who couldn’t afford a pair of tall boots for hacking and thus saved their single pair of boots for shows. They were meant to be worn with paddock boots and were pulled down over the top of the paddock boot. They had a cuff at the bottom and a strap that went under your boot to keep the jods from riding up your leg. Children also wore garters with jods, a leather strap that buckled around the leg just below the knee to help keep the legs of the jods in place.
Then you had Kentucky jodphurs, which were used by saddle seat riders. They also went over paddock boots, but the bottom of the leg was flared rather than having a cuff.
Advances in materials, especially the advent of durable stretchy fabrics, have, over time, led to the addition of a fourth kind of riding pant, the riding tight, which is long like a jodphur but with an elastic (usually) end to the leg instead of the old-fashioned cuff.
Half chaps were invented, people started putting zippers in tall boots, and the design of breeches and jodphurs began to change. The distinction between the different types of riding pants began to blur, and pretty soon it’s complete chaos. Human sacrifice, cats and dogs living together…mass hysteria.