Frankly, if I were tasked with integrating existing BI tools with MongoDB, I&#x27;d immediately start looking at ways to &quot;escape&quot; the anemic Mongo ecosystem to something a bit richer.  A Postgres FDW seems like an excellent design.<p>Of course, I&#x27;m a bit of a Postgres partisan, and a Mongo refugee, but it still seems like a solid engineering decision and most of this guys arguments seem to hinge on &quot;BUT POSTGRES IS TEH ENEMY!&quot;.