Oh, wow! I started using that in my university days (2002) as notebook for classes and eventually for everything else, didn't know it was ever a thing. It just made sense, given how much one-side only printed pages I had laying around. I also tried a crud bounding with twine for more stability but figured a second clip on the opposite side was enough and saved me the effort of punching holes. I also reused an old moleskine notebook cover which was just the perfect size. It still lives today, now as my ebook reader cover and a few blank pages. With a rubber band, it can also fit nicely an securely a pen.