Comment by zzo38computer
8 months ago
IRC. And for slow discussions with long messages, you can use NNTP.
(However, GitHub is accessible by git in case you only want to download the repository, regardless of what else they do; however, having multiple mirrors on other services as well can be helpful)
While I’d love to agree: many people these days simply don’t want to use IRC.
You can bridge to matrix and use a matrix client. Then you get history even offline.