pir alarm systems are a way of the past. here is why.
Traditional alarm systems that use PIR sensors will be soon replaced entirely by CCTV Based Alarm systems that use AI detection technology.
Camera based alarm systems can be used in locations traditional alarm systems will struggle. Outdoor areas subject to weather and wildlife movement are a real test for PIR sensors and often costs for outdoor pet proof PIR sensors can be very expensive.
CCTV based systems offer immediate verification so you can see what exactly caused the alarm. A traditional alarm system can only provide a signal that movement was detected.
Traditional alarm systems have had a very long run being the only option for protecting property but now the AI detection capabilities of CCTV cameras that integrate with sirens and strobes will soon make them obsolete.