I’m all about new feature but making the Javascript web gui default was premature.
I believe that the Javascript gui is a great addition to ROOT but as implied by ajrpuckett, Javascript in application code has been banned by some.
One thing I would request is that you do not get rid of the old gui or I will have to drop ROOT if there is a move to Javascript gui only. I will still use it for my personal projects but I won’t be able to use it for anything else. I really enjoy the ROOT gui and being able to double click on my figures and zoom in. The ROOT binaries and these gui features are what make the difference. Knowing that I can go to my old root files from my PhD and open them up.
The original gui was not be the most elegant, but it was stable enough to get a lot of work done.