Originally Posted by james_swift

The steerer tube is threaded, so it provides a super-solid and secure grip on the stempost when it's clamped on.

I clear countless potholes and curbs on my daily commute through San Francisco with confidence that I always forget that the stempost is removeable. I have drop bars, and I constantly rock the bike out of the saddle, pulling up hard on the brake hoods with no issue. The front end is solid throughout.