If you look the chart on Wiki you can kinda get an idea. One of the iPad spans over 5yrs of updating. I'm guessing that it stopped was because it was 32bit? Current iPads and iPhones are very similar (64bit, touch i.d. or face i.d. camera). Maybe this will be 5 or 6yrs. You can still use it after that. Some of the Apps are supported. The upside is that there is more space to work with vs the earlier models.