I could have phrased that more clearly, sorry. I mean why do you need to put neg pages in to rings? I have more than thirty years of negs, in glassine/paper pages, stored horizontally with no stress on the negs from one corner resting on the bottom of the binder-box. If binders are placed vertically they bend the negs, if they are not placed vertically then one doesn't need any rings to hold the pages - one can let gravity do it.
I store them flat so no stress on the pages. When I want open a binder full of negs and want to flip through them, it's easy and everything stays in order rather than falling onto a dust covered floor. Works for me so no reason to change a system that's suited me well enough to fill seven 2.5" binders in the last 12 years.