Incredible how people seem intent on pinning this on BIG BAD JOLLA, when it’s the exact same shit as on Android and iOS (and Windows and Mac and …). Someone who wants to break into your house will always be able to get in, but that doesn’t make a simple lock useless.
More than half of the devices on that list (C, Tablet and Xperia X) are no longer supported as of 4.6, and honestly haven’t received any real updates with fixes specifically for those models in years. XA2 and Xperia 10 no longer receive any real updates either and will be dropped in two years when Sailfish 6 is ready.