Google's mobile platform may well be the most popular on the planet, but if it keeps springing security holes its going to be very difficult to keep the ship afloat.
The latest bug being reported by Ars Technica is a lockscreen vulnerability which allows anybody unauthorised access to any phone running Android 5.x
I say any phone, but that's not quite true. Google released a patch last week which should have addressed the problem on Nexus devices. The rest of the Android community? They'll have to wait. Anecdotally it appears that Samsung has been pushing the patch to some devices in some regions - but presumably not ones locked by carriers.
That leaves most Android users exposed, with no real idea of when this might get fixed by their OEM and carrier. Exposing once more the weakness of the Android platform.
In a week when Apple will launch iOS 9 to all iOS devices from the last four years this sums up the differences between the two platforms perfectly.
If you want an Android phone and want ongoing updates and security then your only choice should be a Nexus. Anything else is all about risk.