I really love the idea of a camless engine. Is there some fundamental reason it hasn't been more widely adopted other than tooling change costs? I can't imagine

I really love the idea of a camless engine. Is there some fundamental reason it hasn't been more widely adopted other than tooling change costs? I can't imagine the solenoids are that much more expensive than a ground camshaft and all of the supporting hardware at volume. This very much feels like the transition from brushed to brushless motors to me - super cheap compute power and sensors unlocking a much more efficient way to drive electric motors. As far as I know there's no _real_ advantage to brushed motors except in dirt cheap applications where a potentiometer is the most expensive speed controller you can afford.