Re: The lack of update to phones is a bigger problem
Not true, wife's phone got November 2016 security update on 4.4 a few weeks ago. Don't fall into the same flawed assumption that many plebs make, Google release monthly patches for 4.4, 5.x, 6.x and 7.x
You do that need android 7 to be secure, you don't even need android 7 to run the latest stuff from the app store either, Google play services and Google compatibility libraries take care of that. If you have an older phone, essentially as long as you get security updates, you are better off with the OS the phone shipped with, rather than a bogged down, less tested full version OS update.