Why is conversations feature missing?

I can't make a new conversation (the dm feature) on this site, while the conversations page still exists it's clear that it's been removed purposefully.
So I was wondering why and will it ever be added back? I personally really like the feature and was going to use it before noticing it's gone on here.

Bump

The way private messages work on Philomena makes them a nightmare to moderate and a very easy vector for abuse. For the sake of everyone's sanity we've opted to disallow them except for staff to communicate with users.

If there's a compelling argument for it, we may consider adding them back, but as it stands there are plenty of other ways to get in touch with other users.