[toast0]

How many of those sold six years ago are still operating?

My guess is many have had something go wrong to the point that they're no longer used.

[hungryforcodes]

The iPhone 6 and SE are still hugely popular in Asia. I see them everywhere, and there is a whole after market economy for repairs and parts replacement.

[GeekyBear]

They are also still hugely popular in the US.

Even the performance under the current OS, six years later, is still fine.

https://arstechnica.com/gadgets/2020/09/ios-14-on-the-iphone...