>The challenge is economical, cultural and political, not technical.

While there are some technical hurdles to overcome to make a phone that lasts 10 years, they aren't that big comparatively. The real problem comes when you need to support software for a decade, getting people to buy a phone that's more expensive, larger, and slower than the competitors, selling enough to make the whole thing economically feasible, and getting people to be okay with a dated looking device.

I just don't see that being possible right now, especially while phones are still getting higher resolution, more capability, larger batteries, and smaller form factors. Maybe when phones hit the same plateau that laptops did a few years ago it will be possible, but I would not want to be part of a company attempting it right now.