Staplers
With the new advances in staple-less staplers, most users agree that we have reached the zenith of stapler technology. While this innovation may be exciting for some purposes, it may be inconvenient for others.
The Fork, Knife, and Spoon
The classic trio of fork, knife, and spoon has stood the test of time, remaining largely unchanged for generations.
Mirrors
Mirrors, according to one person, cannot be any more reflective than they already are.
Zippers
The zipper, a popular and convenient fastening device, does not appear to be changing anytime soon.
The Wheel
The idea behind it—a basic spherical item that rotates to reduce friction—has been around for millennia and has endured the test of time. The essential principle of the wheel has remained unaltered, despite developments in materials and applications.
Bicycles
One user noted that bicycles can't be improved upon because they're already the most energy-efficient transportation method out there.