Facebook F8 all over again in the sense of startups throwing the success or failure of their company onto a proprietary centralized system that can block or cut them off for any reason. Or rather, another incarnation of IRC chat bots, email listservs, and stuff that's been around forever as commodity autoresponders, only now it's worth millions in investments to write the equivalent of a weekend hack IRC bot because…
I see Google using Slack for things like the Dart and Kubernetes projects. I understand the ease of use aspect (Slack is quite nice) - but one thing that concerns me is that the discussion that happens is no longer (easily) searchable. Mailing list archives are handy when you are looking for a solution to a problem. With Slack, a lot of that knowledge disappears.
> but one thing that concerns me is that the discussion that happens is no longer (easily) searchable.
No it is not. Look at the top right and type your words. If you use free plan, only 10k message will be archived, other than that it will be deleted.[1]
> Mailing list archives are handy when you are looking for a solution to a problem. With Slack, a lot of that knowledge disappears.
Its a tool for direct communication for group, not for documentation. I think you miss a hammer for screwdriver.