When you’re managing a decent sized wireless network all the out of date Android devices are a right pain in the ass, so often I find devices that aren’t just out of date (usually Samsung’s) but also devices trying to connect to dodgy BitTorrent and P2P networks - furthermore when I speak to the user(s) involved 99% of the time they genuinely didn’t know their device is running dodgy software such as malware with P2P connections OR that it’s a potential security issue that they haven’t or often can update their OS. Most of the time the devices look quite modern too, it’s not like its people running really old devices.