This was obviously going to be the reality. It's not because they whole peloton wants them. Companies don't want to have to make two versions of the same bike. Nor do they want to have to make separate electronic/mechanical groups so mechanical is starting to slowly be phased out as we see with the new Ultegra.
I've never really liked my disc road bike but I will say that after 3500 miles on them they suddenly seem to have become more powerful like I always thought they should have been and like the SLX's on my mountain bike are. Once I finally got rid of the squealing I didn't mind them too much but my rim brakes actually had more bite. But in the last couple of weeks they've become great and it's kind of weird. Maybe they need a 3500 mile break in.