Ex 
Choosing a community platform is hard 
To help you make the right choice, we've put together an extensive guide to the 3 top platforms.
TL;DR recommendations
Detailed analysis
28-row comparison grid
Strong opinions
This guide has it allhttps://orbit.love/blog/slack-vs-discord-vs-discourse …
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Oh, that'll be a news to me. There's always a threat like this but I had high hopes
Maybe you can also consider 
yeah, the new community thing at github and the new forem by @ThePracticalDev could look good in this chart.
But then also @disqus in many ways can be a community gathering tool. No?
