My phone (Galaxy S3) doesn't support Lollipop (and it's looking like Cyanogenmod isn't going to support it either).
To be honest, my phone works "good enough" for me. I'll upgrade when it gives up the ghost.
I haven't upgraded my laptop in 8 or so years, because it works "good enough". Same goes for my DVR, even though it doesn't support HD. The only reason I got a new TV was because my old one died (that said, being able to watch YouTube and BBC iPlayer directly through the TV is brilliant).