Mobile devices also have much less reason to lose support than they used to. In 2010, the difference in hardware between a new phone and a 3-year-old phone was

Mobile devices also have much less reason to lose support than they used to. In 2010, the difference in hardware between a new phone and a 3-year-old phone was huge - 8 times the RAM, 4 times faster CPU, twice the display resolution, etc. Nowadays, the Nexus 5's specs are on par with midrange phones being released as new. It has all the hardware required to run modern apps. There's no good reason why it can't be supported, besides getting more money from people if they have to buy a new phone every 3 years.