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Decentralized Matrix messaging network says it now has 115M users
(www.bleepingcomputer.com)
This is a most excellent place for technology news and articles.
It's used by a lot by organisations who want an alternative to Slack/Teams. Have a look at the client list for Element, arguably the biggest Matrix client/platform - https://element.io/
And as someone else mentioned there's also a huge influx of IRC folks especially in the last year.