Do you think that hackers as a market aren't, by near definition, early adopters and want new technology? I don't know who else a 10 year old phone would appeal to but parts of the mass market?
(Some) Hackers are also the kind of people who keep their hardware around for ages and run strange OSes if it fits their needs, because they want daily tools to work, reliably and like they always did. Tinkering can happen on top of that or with less important things.
Yup. I'm running a four year old phone because it does what I want and newer phones don't. Money isn't even an issue, there just isn't choice out there today.