[DanBC]

There are a lot of not-very-good-bikes -- usually refered to as "bike shaped objects". These cheap bikes make the good folding bikes seem expensive. (Is this like an "overton window"?)

A good folding bike is probably a great choice for many people.

[Someone]

A good folding bike, at best, is a decent bike. Folding bikes have smaller wheel diameters, lower frame stiffness, and larger relative weight.

[notatoad]

and carrying your folded bike around with you when you aren't riding it is far less convenient than carrying a lock while you're riding the bike.