It is definitely difficult because every year people ask whether meteor is dying. So eventually it might just happen, but meteor keeps up with its heart beat.
Meteor is quite different from other frameworks like Express/FeathersJS etc... They tend to be more like Libraries, whereas Meteor is a full Framework, all the decisions made, packed and working for you.
Meteor is no longer as simple or as powerful. They allow you to mix and match and are becoming more of a library, but without the...
Why?
Well... The javascript ecosystem moves quickly, every 2 years there is a big boom in a new direction. Some quick research by Anthony (a.com) shows:
Backbone | September 2010 | May 2012 |
Ember.js | November 2011 | April 2013 |
AngularJs | March 2012 | August 2014 |
For Meteor's initial release in 2012, the above trend doesn't bode well, but it has stood for quite some time and likely will...