Luckily, because it's open, Android has no such problems.
Only 2.7% of all Android devices run the current version, but I'm sure that every Android user has an up to date third party browser they use exclusively.
Most Android phones have an outdated OS and will never receive updates to the current version of Android. It is also known that most users never switch from the default browser on their phone or computer. And sadly, before Android 4.0, the default browser was pretty crummy.
