I think you have to ask why a developer would want to use an online IDE, and focus on that. Do online IDEs have a unique value proposition, or are they just another instance of the counterproductive "X but in the cloud!" formula?
I have the feeling that people want to build online IDE's and that management thinks it is a good idea. I've not encountered many developers that like to use it fulltime. One counter example is https://community.nitrous.io/posts/nitrous-io-stories-yehuda...
