Assisted actions were great back when great manual actions were less common or more expensive. For instance, I got my first Leek in 2004. I was very impressed with the action then. Fast forward about a dozen years and things had changed. Caged bearings had come way down in price and were becoming much more common. As I began to see more budget knives with good manual action, I slowly stopped caring about assisted actions.
Now in 2022, my old Speedsafe knives from Kershaw feel downright janky. I've got a drawer full of budget knives with great manual action from companies like Civivi, Kizer, Bestech, Petrified Fish, and more. They are all so much more impressive than my older assisted knives. I've only got one Speedsafe knife still hanging on in my EDC rotation, a premium version of the Dividend. (Coincidentally, it's the knife that retired my Leek.) Every time I use it, I notice the little bit of slop in engaging the assist and the pressure needed to overcome it upon closing the knife. If I found something to replace its specific EDC niche, I'd drop it in a heartbeat.