I took the "wait and see" approach on electronic shifting, opting last time in 2012 for mechanical. I don't regret that, but I REALLY don't regret going with full Dura Ace Di2 on my new bike this time around. It's absolutely perfect. It works great with my oval chainrings too. A few of my riding buddies have Ultegra Di2 and the owner of my LBS has Campy Super Record EPS. Nobody complains and everybody just loves it. I don't think mechanical is dead, far from it in fact, but electronic is here to stay and will only get better and cheaper.