I am an admitted Apple fanboy, but even I recognize that Apple is an offender in this field. We have tons of old Apple iPhones and iPads that had functionality

I am an admitted Apple fanboy, but even I recognize that Apple is an offender in this field. We have tons of old Apple iPhones and iPads that had functionality that no longer works - app developers stopped supporting the only iOS that can be loaded on the device. It is only a matter of time before this happens to HomeKit too.