I use the Op/Tech system with my camera. There are plastic clips on the camera and all of their different straps fit up to them. Typically I use the wrist strap, but if we're on some kind of a touristy thing, then I use either the neck strap, a side sling, or a harness depending upon what my wife has planned for us. With the plastic clips, changing from one to the other is no more clunky than zipping a jacket.
Since I am old, I always have some kind of strap on the camera (the wrist strap is my favorite) as much for not losing it
as for dropping it.