Who knows how long upgrade will be here in a few years? Or if we will even exist.
The decision is personal for every one of us. I bypassed a 3 year upgrade because I liked getting my first choice of line every month. And transition.
Even though I made it pretty clear that I was a No Voter, I'm still not leaving. This is a fine place to be for a career. It may not be as glamorous as wearing a hat and getting a lie flat deadhead, but it will take care of my family for another 20-ish years. (Let's hope) I for one am not willing to start over yet again.