I currently have Ultegra 6800 and for the longest time I was against, and I still am for most use cases. The gaps between ratios are too big in something like a 10-42 cassette necessary to produce a similar range to 2x.
But living in Illinois there just isn't enough elevation change to use more than one ring. And I'm tired of the FD trimming. I was thinking of getting Di2 for the auto-trim feature, but then realized that 1x would get the job done fine while being simpler (and cheaper) than an electronic system.