People have just gotten used to having the fastest toughest folder available that holds an edge forever and can stab through steel drums and car hoods. ( Thanks a lot Lynn Thompson and cold steel )
They've gotten used to having a knife they can abuse and use for things other than cutting stuff..
They have convinced themselves that they really require such a knife to cut cardboard and open packages and mail, even though their beastly thick " tactical " modern folder probably doesn't slice worth a crap and takes twice as much effort to get through cardboard.
As a teenager all folders had to be one handed and fast, but I've realized I don't need speed.
Hell I really dont even have much need for a locking blade at all ( not that I don't love a good lockback ) so most times it's a smaller traditional two handed folder or on occasion a belt knife of some kind.
This has been my carry it the past few weeks.
A modern one handed folder may be faster and more convenient, but that does not mean these are slow and inconvenient.
Any knife I can carry with me is convenient enough and these happen to slice like nobody's business.