Not only mobiles, but also desktops and laptops. For example, there are lots of unibody MacBooks which are perfectly functional but no longer get updates from A

Not only mobiles, but also desktops and laptops. For example, there are lots of unibody MacBooks which are perfectly functional but no longer get updates from Apple. However, in case of mobiles, things are particularly awful because it is often not trivial to install and maintain an OS other than the one supplied by the manfucturer. It's incredible how much electronic waste and security issues are generated by lazy manufacturers who do not mainline drivers into the Linux kernel.