Author here. There's not much to say here that wasn't said last time, but here are some retrospective thoughts on this post:

- Probably would have come across better if I didn't pitch IRC as better than Slack in general, but only that it's better for FOSS projects. This blog post wasn't meant to shame Slack in general, even if it kind of did in the end.

- Importantly, Slack has come out as saying that they don't want big public projects to host themselves on Slack. It's really just not a good use-case for Slack to put a FOSS project on it.

- In hindsight, a lot of the FOSS-friendly alternatives (Matrix, Gitter, etc) are quite good and I should have put more effort into researching them and discussing them in my article.

It's probably too late to steer the discussion, but please remember that my post addresses the use of Slack for FOSS projects, not in general.