Like others have said, it doesn't really stand out anymore. Every time I saw the logo even at a glance it was easy to identify as Slack. Now on my phone whenever I see the icon I have a moment where I don't recognize it, the realize it's Slack.
Sure, but wouldn't you be able to say that about any icon change?
I'd say almost any, but they can have a natural progression. I don't have a solid example, but when logos have a more natural progression they're still easy to recognize. I'd argue if they kept the new logo, but didn't tack on that jarring purple background (at least for the app), i'd still recognize it at a glance.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.