You know there is a fork on Android called Aliucord. It allows you to install pluggins like better discord.
They're mods of the proprietary Discord client, so yeah they don't meet the criteria. But the mods themselves are open source which is nice.
Great info. I can understand modifying YouTube to remove ads, PnP, & screen-off usage for an entertainment app, but I don’t know I would tolerate that for messaging actual humans. It’s a shame these efforts aren’t going into self-hostable, decentralized options. :(
Its not a fork it just injects some stuff into the app. And it uses a really old version as a base because they have a shortage of devs.