Hm, i do thing witu c/c++ the benefits of using an IDE are not as great as for other languahes like java/python etc etc but still existant.
I wont programm java without my IDE, for c/c++ i mostly just use vim with someplugins for autocompletion. I could be a snowflake tho.
I second matrix. Its also federated and has mutible clients. But like lemmy under development (but more advanced in the development process)