I have a Nexus 7 from 2012 that is just begging to be replaced. I'm not one for Apple products, so I've been waiting for the next big thing in the Nexus family. They haven't released anything in that size range since 2013. Hopefully this year we'll see a replacement.

However, you're right about most tablets. If they still work there isn't a need to replace them that often.

I replaced an early tablet as it just didn't have enough memory, and was not upgradeable. It was one of the basic clones The replacement tablet met my requirement precisely, has expandable memory, and, as long as the battery remains strong, I won't have to look at anything else. That was over four years ago. Actually, it may be coming up to five since the model was launched. I'm not sure what can be done about the battery as i've not even thought about replacing it. I would have thought it was replaceable, and if that's at a reasonable price i'll hang onto it, rather than get another.

The kids seem to be playing with a tablet computer, and unless it gets broken, which may be likely, there's no need to replace it.

As i suggested, I think there's market saturation of tablets in developed countries, leaving developing countries for the low end devices.

I can see the demand for high end tablets, and i'd consider one myself it I didn't feel it was a little pricey compared to a decent laptop.

another market saturation.

Look how cheap you can pick up an amazon fire, and that will do most everything a casual user would use it for.

Retail numbers have greatly decreased, but wholesale to schools, libraries, corporate & medial facilities remains strong.