[tonyedgecombe]

The iPad 1 was pretty much the worst case, if you bought just before it was discontinued then you would have got 14 months of updates.

We had one and upgraded for the reasons you mentioned, it couldn't cope with JavaScript heavy web sites. However even without the bugs I don't think it had the horsepower to handle the modern web, no amount of updates would have fixed that.

iOS 12 supports devices back to the iPhone 5s, so more than 5 years.