I looked at the screenshots of KDE Telepathy and I'm not convinced. This kind of multi-protocol IM client exists for every major desktop OS — this and Pidgin for Linux, Adium for macOS, Miranda for Windows, etc. The problem with all these apps is that they're not modern. They do great for text messages, but that's it. Anything beyond text is an afterthought if implemented at all. What I mean by "modern" is first-class support for all the IM features people now take for granted: media attachments, server-side history with search, replies, mentions, reactions, forwarding, bot features, channels, etc. None of these existing apps even try to do any of this. This is what I want to fix with my future project.