It’s worth noting that Gitter hasn’t been updated in well over a year. It’s clear that GitLab has no interest in maintaining it. The iOS app is non-functional due to bugs as of iOS 13, and the macOS app will cease to be operational in January due to notarization. Staying on Gitter is probably not an option for any of us.
To some of the other points… I hate slack threads. They take conversations out of the main line and make it hard to follow. I know a lot of people like them though.
Voice channels are very seldom used in my experience.
Slack lacks real markdown, syntax highlighting, and a unified community interface. It’s signup process is also worse than discord and the moderation and permissions tools are light years behind. That alone is a huge, huge point against it.
The lack of anonymous readability is a problem. Slack also shares that issue, but it’s definitely a point in favor of Gitter… if Gitter were an option. Which is kind of my point. It isn’t. It ceases to function on any Apple device in a few months (and already behaves very poorly where it does work), and it’s not like the Android experience is much better. It’s a dead platform, and sticking with it really isn’t on the table in my opinion.