The article is talking about webtask.io, the underlying engine for sandboxed code execution used by Auth0 for allowing customers to extend the platform with arbitrary nodejs code. In such system there is a need to acccess real time logs (think tail -f) while you are debugging your stuff.
Also, the emphasis is not just the real time aspect. The article mentions the issues with kafka for HA
Also, the emphasis is not just the real time aspect. The article mentions the issues with kafka for HA