I never understood all the hate mongo gets. Like any tool, if people simply took the time to understand it and use it correctly, maybe they wouldn't run into issues.
It's better now, but very few things worry technical people more than a database that loses data. It's hard to get past that early impression.
> This interpretation hinges on interpreting successful sub-majority writes as not necessarily successful: rather, a successful response is merely a suggestion that the write has probably occurred, or might later occur, or perhaps will occur, be visible to some clients, then un-occur, or perhaps nothing will happen whatsoever.
> We note that this remains MongoDB's default level of write safety.