[schismsubv]

If it's about politics, a lot of that extra stuff will be to make it non-bypassable. That said, just how many people are getting shot with their own gun as a component of overall firearm murders?

Don't forget the power supply, and don't undercalculate antenna design needs (it probably won't work incorporated into the handle of a pistol). The electrical draw will probably need to be pretty beefy in order to be as reliable as the rest of the gun's mechanisms, and what happens when the gun is being carried or stored in -20C temperatures? What about off-hand shooting when your normal shooting hand is unusable or it's dangerous to shoot from your normal side?

In order to be both universal and not introduce unreliability, the solenoid would likely have to be introduced as a secondary safety. How many firearm designs would even support a secondary safety?