Some of us are already using MongoDB and are not so keen on replacing it.
If you read back the discussion was scoped to "new projects". By jospehg:
> I'd seriously question the judgement of any senior engineer who picks it for a new project over rethinkdb or Postgres.
Re:MongoDB 3.4.0-rc3
by laichzeit0 on Tuesday February 07, 2017 @11:27PM
(#13595744)
It's about making tradeoffs. If MongoDB works for you (I actually enjoy using it tremendously) then I have to ask myself am I ok with its non-perfect integrity. For my use cases this isn't a problem. I'm not working with customer data or anything where losing a few records would make any difference at all.
I don't really understand the angle of "can I get away with it anyways, tho?"