Say we used xp, vista came out and it was bad, we got to choose to avoid upgrading to it and waited for win7. Now, win7 is stable, win8 came out, we don't necessarily need to upgrade to win8, mabye win10 is better than win8 and we, as a win7 users can decide whether we want to use it or not.
Unfortunately, being an android user, my fate is decided/governed by google/lg/verizon and it is extremely unfortunate. We paid our share but the products we purchased are controlled by vendors. Can someone please educate me how this logic works? 
I am very confused.
Thanks