Rails and Merb did it (http://yehudakatz.com/2008/12/23/rails-and-merb-merge/ http://yehudakatz.com/2008/12/23/rails-and-merb-merge/). However io.js seems to b

Rails and Merb did it (http://yehudakatz.com/2008/12/23/rails-and-merb-merge/ http://yehudakatz.com/2008/12/23/rails-and-merb-merge/). However io.js seems to be setup the right way here. Javascript development growth is still in massive growth phase. It is hard to prove the singularity exists when paths keep diverting. I think it is probably healthy to have 2+ or have one win out in the market. Or maybe create others as javascript becomes more prevalent. As the overall javascript development market gets bigger, this will happen more and more. If it gets crazy divergent then standards come about so they work together better. Everything is going to be alright.