[Christ]

The thing about solenoid actuated valve trains is that they're so expensive that the current return on gains wouldn't be worth the cost associated with implementation. Just the programming alone is very complex, and requires more sensors than are currently in place, which necessitates a new feedback system for the powertrain controls, then the additional electrical energy necessary, the failure rate of solenoids which work constantly, the PWM controls needed to prevent the valves from "snapping" open and closed (creating fluid dynamics nightmares beyond comprehension), and then the excess programming to do what the solenoids were intended to do beyond normal operation - determine if the driver wants power or FE, and adjust the "profile" accordingly. This would require some sort of logic circuit based on inputs and a feedback loop, so much more complex than what we have now, and for gains in the realm of ~20% power or FE (assumed number).