Don't want one, won't buy one, will not convert mine to one. Nuf said.
Nobody's going to be able to convert existing guns cost effectively. Liberals seem to think it's as easy as applying a decal to the gun.
Each type of gun would have to have the frame/internal parts modified/replaced to accept a custom mount for the solenoid/servo motor, custom grips to contain the electronics, etc. No company is going to make any money creating and testing 100's of versions of a 'kit' unless they can sell them for more than the original price of the gun. Many guns are simply not suited to conversion at any cost.
Technical issues aside, what company would be stupid enough to accept the product liability created by multiple kit designs installed on USED guns? Not gonna happen.
No, If anyone's going to have a smart gun it will be purpose built from scratch by an established manufacturer with deep pockets and a large legal staff. Lawyers, guns and money!