Web sockets and live data sources

I see on your roadmap that Web sockets and live data sources are in a distant future far far away.
However I see in discussions that the Snap App plugin and Splunk plugin are capable of pushing data to Grafana. How do they do that if it is not supported? Are there any instructions on workarounds?
I also see some discussions involving Grafana-Live. Is that a data-source that is on-hold?

Best regards!