The home security industry is, in general, horribly manipulative. They make money on fear and customer lock-in (subscriptions). As such there appears to be little pressure to adopt advances in tech, to cost-reduce, or to make things easy and friendy for end-users. The systems are complex and baroque, and there is a reason for it.

There's probably room for disruption here. I imagine a lot of the roadblocks to this will be regulatory, such as if you integrate fire alarm systems or devices that are hooked to phone lines.

The two weekends I spent wiping, reverse-engineering and reconfiguring an old ADT installation really made me want to design boards and write firmware again.