It is, I believe, a misrepresentation to suggest that everyone “joined” Meteor because it “was” cutting edge. I for one did not “join” Meteor for this reason, and reading back now on just one thread of the many on this topic, Next steps on Blaze and the view layer, it seems clear many others share my sentiment.
But setting aside your wrong-assumption for a moment, the notion that if one did “join” Meteor for its “once” cutting edge-ness then one looses the right to future criticism is also false I believe.