[jt2190]

  > I've seen [the problems that occur when you're working 
  > with an immature ecosystem] before. I started with Rails 
  > in 2006. It was difficult in the earlier years. It has 
  > only really matured in the past 3 years. I think Rails 
  > 3.1 really embodies everything you need to make a 
  > certain class of web applications. Ember and its 
  > ecosystem are so far off. 

Using rails as our yardstick:

    Rails Releases           Ember.js
    ---------------------    --------------------------
    3.1.0 August 31, 2011    Now + 6.5 Years (End 2020)
    3.0.0 August 29, 2010    Now + 5.5 Years (End 2019)
    2.0.0 December 6, 2007   Now + 2 Years (Mid 2015)
    1.0.0 December 13, 2005  Now (Mid 2013)

So starting an Ember.js project today is like starting a Rails app in 2005. Probably too much headache to take on for six month to a year long projects, but if you're looking at a 2-3 year timeframe and Ember.js gives you a technology advantage over other frameworks, then it might a good time to try it.

[scardine]

I dated Ember for a while but I ended up married with Angular.

Ember is really cute and charming. When it works it is all magic - but when it doesn't it is way harder to figure out what is wrong.

So far, Angular seems to have a stronger foundation and will eventually catch up in beauty.