Mastodon, Pleroma and other ActivityPub platforms have gained traction with millions of users, even Gab was just a (very outdated) fork of Mastodon. Matrix is

Mastodon, Pleroma and other ActivityPub platforms have gained traction with millions of users, even Gab was just a (very outdated) fork of Mastodon. Matrix is federating chat, with Mozilla, Gitter and numerous others natively using the Matrix protocol. Meanwhile, there are dozens of mature bridges to pull in IRC, Slack, Discord, etc so you no longer have to install their software: https://matrix.org/bridges/ https://matrix.org/bridges/