I hear that. I dunno that I'd do an AR-12. I've never had experience with em but I'd be skeptical of the platform being capable of handling that much pressure reliably.
I didn't invest in cameras because I live in a quiet neighborhood in an otherwise questionable city. I just don't feel that's necessary where I live. But everyone's conditions are different. I may have to in the future, but currently I don't see it being high on the list.
I also get the sentiment of being on borrowed time if it's escalated beyond 5.56. But my thing is, if I have to go down, I could certainly make it harder to take the next guy down. At that point, I'm doing my part. All I need to do is make sure they have less people to put toward storming the next guys house. If we all did that, the fascists would run out rather quickly.