1: To be able to remote control the alarm system remotely...
I blinked at this several times before remembering that we were advised that El Reg staff were going to have a break to, er, celebrate the New Year. Notwithstanding this linguistic horror you are nonetheless forgiven.
2: That means a lot of legacy products, compared to the two to three year product lifetime we are seeing on general IoT products.
Well that's another reason for having nothing to do with the stuff, then. Two to three year product life? I expect anything vaguely falling into the description "hardware" to have a much longer life than that. Two to three years falls into the category of "taking the piss".