It's just a small very well engineered underpowered notebook
Under/adequately/over-powered is a subjective matter. It may not have as much cpu as you need, but for the purposes the rMB appears aimed towards, it seems to do a fine job.
What tasks have you thrown at your rMB that it's failed to handle? I know that in my use it's had quite more than enough power for the things I need it to do. (you do have an rMB that you've used enough to assess it's capabilities, right?)
[doublepost=1459953994][/doublepost]
Sounds like you're not really using that "powerful hardware" then if your usage isn't ramping up the fans to audible levels.My Retina MacBook Pro has fans to keep the powerful hardware cool. They are inaudible.