Inspiration very much so, code and technology not at all. (I'm one of the Zulip developers.) I have enough friends who've hacked on Zephyr, and they tend to ge

Inspiration very much so, code and technology not at all. (I'm one of the Zulip developers.) I have enough friends who've hacked on Zephyr, and they tend to get such a look of horror on their faces when talking about that protocol and codebase, that I'm pretty sure that was the right approach for us. :) It really was/is a fantastic social product, though.