fwiw, rands (Michael Lopp) is the VP of Engineering at Slack

And the author of the first book I bought on the topic: "Managing Humans: Biting and Humorous Tales of a Software Engineering Manager"

Great, insightful book and a fun read. Highly recommend

The blog is great too! http://randsinrepose.com

Who is it not accessible to? Just because you choose not to create a Slack account doesn't mean it's not accessible to you.

Slack does quite poorly on accessibility, so anyone using assistive measures from their operating system or separate application (voice instructed navigation, screen readers etc) will have a much harder than the average blog post or mailing list.

Based on the context, it's pretty clear to me that the parent comment was not referring to accessibility in the a11y sense, but more of the "Slack is a private company and therefore inherently closed and evil" slant.

I personally find Slack to be utterly abysmal at actually keeping information, stuff that scrolls up beyond the fold is effectively lost. Maybe that's what GP meant?

Old content in Slack is not available through search if you are not on a paid plan but I was more referring to the public open web and people trying to find answers through search engines.

If you use the other plan, old resources are not accessible anymore. Is it fine enough?