I suspect they're referring to https://matrix.org/blog/2019/09/27/privacy-improvements-in-synapse-1-4-and-riot-1-4 https://matrix.org/blog/2019/09/27/privacy-im

I suspect they're referring to https://matrix.org/blog/2019/09/27/privacy-improvements-in-synapse-1-4-and-riot-1-4 https://matrix.org/blog/2019/09/27/privacy-improvements-in-s... and https://matrix.org/blog/2019/06/30/tightening-up-privacy-in-matrix https://matrix.org/blog/2019/06/30/tightening-up-privacy-in-...