I guarantee changing from BD prophets/shrikes/x15 to CM quarks/BD cobras/etc will make you feel like you are in a different sport. The difference is huge.
Also if you have the misfortune of climbing pick lines (such as high-season Professor's, etc) a pair of straight-shafted tools are miserable, rattling around in modern-tool picked out trash. Then again you can start up a new line, sometimes.