Board Thread:Wiki Editing/@comment-26339491-20170327014506/@comment-26339491-20170731173712

It's very standard not to support every instance of a system (or, for example, every possible browser), but just the newest few which are used by the vast majority of users. Each one has its particularities that we'd have to account for, older versions often don't work well with new features, and making sure an app works with all possible version of an OS would just be more work for us than it's worth. The older a phone is, the more likely it is that it'll be too slow to run modern apps anyway.