With limited exceptions (Police, the various rescue models, and the Salt Series), serrated knives don't seem to be selling well anymore. IIRC, the SE version of the Caly 3 was the first to be dropped, so perhaps they considered making a SE Caly 3.5 too risky. Am sure that if the SE option is being dropped on any particular model, poor sales is the reason. It's not universal, they do offer the VG-10 Stretch II in SE, and (somewhat surprisingly) CE as well.