It is also worth noting that app developers may continue to maintain their app even if Apple is not offering support of an older iOS version. Another note is Apple's seven-year support is excellent service in my opinion and I think 7 years is fair considering most people will change their phone in that time. For comparison, Samsung only supports phones for four years.
Still, Apple made a point to pay more for their product because they last longer... However, 7 years is still half the duration of their products. Our Apple devices are all old and we are starting to experience software issues (no hardware issue for the most part).
Each of us has an iMac, a Macbook, an iPad, and an iPhone.
Except for the iPhones, which are just three years old, the other Apple devices are from 2014 or earlier. As such, their OS is no longer updated and some apps / softwares are no longer compatible.
The most tedious part is that the icloud (which allowed to share stuff across devices) has cross-OS compatibility issues. I.e. we cannot sync our modern iPhone with the older computer/iPads.
The iPads are running slow, and the apps often freeze and shut down unexpectedly. They also navigate slowly (or perhaps we got used to navigating at higher speed from other devices).
One thing that has remained consistent is touch sensitivity. The screens are always very reactive, and the slow interaction is entirely software. Aesthetically they just have minor dents but are still good-looking (we also used them with a case and only at home since we moved here, which certainly helped).
At this point, I would like to upgrade the devices but I am not sure if it would be better to try and sell what I have here in Argentina, and buy 2nd hand in Europe; or trade-in my old iPad in Europe for a newer model. Last time I went home, my cousins brought me to Chinatown and I traded my old Macbook, which had serious issues (booting issues) for a newer model for €300. I was very happy with the exchange because the newer model is 15" Retina and the screen is AMAZING. If only I could do the same with the iMac...