Response from our own @emile (thanks!) in Slack:
We still don’t know if Slack will be kept or not. It has become terrible to use with time, almost 6k people are here now. Several conversations are usually taking place at the same time
And we don’t have any history!
We hope the forum will replace Slack on most part in the future, but we don’t want to rush, and above all, we want your feedback before taking any decision