Earlier quoted context omitted.
Quite possibly - like hundreds of Millions of other people who use older phones.
This is the reason. All those people who need to be on the absolute bleeding edge, sell perfectly good phones for a quarter of what they cost new, to people like me. Everyone I know buys new phones for anywhere up to 800 for the latest Samsungs (and don't even get me started on the Apple stuff) and I just can't fathom it. It's like buying a brand new car and then selling it three years later to buy another brand new…
Well, most used phones are sold rather than destroyed, and get well past their last update. So maybe a quarter the phone-time in the world is post-end-of-update. Plus, many manufacturers offer brand-new phones which cost under 100 USD (look for Doogee X95 for example - 80 bucks or so).