Everything that you say is true. But I really like the ceremony of using a corkscrew to open a bottle of wine; it is a lot more tactile than opening a screw cap.
It's fairly common. You see it with some of the table wines and it's something the California wineries would love to bring to the higher-end stuff, but they're still in the process of "educating" the public as to its advantages. Waiting for it to become acceptable, basically.