Thanks for the comments, really appreciated! The entire team worked super hard for this.

> this means it is NOT a research project

Yeah, we’re quite proud of the system - the bugs in sync systems can be particularly insidious and it took us a very long time (years) to iron them all out. So we're happy to make such a mature system freely available.

Also - some bugfixes introduce performance issues too, another NB consideration for any component in a data pipeline. So along with the maturity comes a highly performant system: we can work with hosted and self-hosted customers to scale to millions of concurrent connections.