The Problem with MongoDB
Justin Headley

I kinda used mongo for 1 year and have used it quite good, for 2 purposes;

  1. As you mentioned, in starting phase of development, to design db which does not have clear scheme at moment
  2. When needs high scalability; i.e saving IoT info, literally every data, and does not require relations and complex OP.

I think it is good for its own purposes, very much ☺