If these things were so amazing, you'd think the police would use them. After all, they aren't in a situation like the military, where you might need to use somebody else's weapon, and it IS an occasional problem where the police have their own weapons taken and used against them. Plus it sets a good example.
So they should be all over them, right?
Ya well, not so much for the reasons the original poster detailed. Reliability is a big one. You'd have to prove the reliability of the system, in a bunch of trials and demos before people would be convinced. It would need to be real reliable too, around the same reliability as the mechanical systems (guns do jam sometimes). If a given weapon has a reliability of 1 problem in 5000 rounds and your smart system causes problems at a rate of about 1 in 50, there's going to be little interest.
Remote issues would be another one. The system would need to be demonstrated to be hardened against remote interference. The last thing the police would want is some electrical system that could disable guns remotely, and even worse, silently. You can harden against that, but it would need to be done and demonstrated effective.
Price is another real concern. How much is something like this going to add to the cost of a gun? I could easily see it being a few hundred dollars. For example have a look at something like an EOTech weapon sight. That's an electronic sight, runs on batteries, that is designed to survive the rigors of battle (the US military uses them). They are $400-700 roughly, depending on options. So, not hard to believe an electronic safety gadget might cost the same. That can double, or more, the cost of many firearms. That is going to be a rather hard sell to people.
If someone can demonstrate a cheap, reliable, solution, well then I can see there being interest in it, at least in some cases. However I've yet to hear of one. As such, no surprise nobody is buying.