Made the move to Di2 a couple of years ago with the Ultegra 68xx series and will never go back. Just picked up a new bike this year with the Ultegra Di2 8070 configuration and still love the Di2 and knowing I won’t have any maintenance with it.
Disc brakes on the other hand have been a PITA with squeal, cleaning, rebedding, and the cycle starts over again after a few hundred miles. I would go back to rim brakes in a second but will never give up the maintenance free Di2.