These days most home automation/security systems are multiprotocol platforms, but they vary in what protocols they support.
Yesterday I was shopping for holiday gifts and one of my brothers wants a “multifunction turntable.” To play vinyl records. So I was looking at some. There was one that plays vinyl, CDs, has a USB port where you can plug in an iPod with mp3s, and a cassette player. No Bluetooth. Another one plays vinyl, CDs, and Bluetooth, but no cassettes. Another plays vinyl, has Bluetooth, and has an a.m./FM radio – – but no cassettes and no CDs. (of course I had no idea what exact mix my brother was looking for, so I ended up buying him something else instead. )
So it just depends on the mix each different manufacturer has selected for each different model as far as what specific protocols they want to offer. And then it’s up to us as customers to try to figure out exactly what we’re getting from their product!