I've always considered switchblades more of a novelty. The mechanism doesn't lead to the best blade lock-up. I'd prefer a frame lock, or ultimately a fixed blade (ultimately my .45😀). Some of the Microtechs are quite nice though. Expensive too. I have a couple of BenchMade "throwers", and an Italian Stilleto. Delaware illegality aside, I would never be carry them for defense. JMO.
Cheers!