Reading through the comments, almost everyone missed the elephant in the room. The big problem with long term support is not on the phone or chip manufacturers.
…::: It’s GOOGLE! :::… Just compare the history of Android with Windows. Windows 10 is still supported for another 2 years, yet it was released in mid 2015. Every Windows 10 capable device is still receiving updates till then.
Contrast that with Android. Android 6.0 came out in October 2015. Yet very few devices from that era are supportable today. Why? A large part of that is based on Google’s never ending -> breaking changes <- and random new requirements that make older devices incompatible.
This got me personally when I bought a Sony Z3 with the intention of having a “future proof” phone. It was openly advertised as being a dev device for Android 7, so much so that a preview release was downloadable for it.
Only for Google to drop a new requirement for the GPU to have minimum OpenGL ES 3.1, while the GPU only had the instructions for 3.0. WTF?! I might add, the specification for 3.1 was only released to the public 2 years prior.
I seriously hope that some alternative to Android will establish itself again. We had Windows phone, which Microsoft utterly butchered. IOS is not an alternative as that’s tied to one manufacturer.