The internals probably don't require a form factor that large. Some of Yubico's other products barely protrude from the port. I think there's a convenience tr

The internals probably don't require a form factor that large. Some of Yubico's other products barely protrude from the port. I think there's a convenience trade-off, though...a smaller one is harder to insert and remove. I have two of this form factor on my keyring, one of which is a couple years old now. Neither show appreciable signs of wear on their connectors beyond what you'd expect from regular insertion. They feel pretty robust, though I've never actually tried to break one... EDIT: minor clarification