Its my understanding the metadata is only stored on the home server that runs for the clients, so under a self host scenario the hoster would be the only party that could access such metadata. One big con to Matrix is that it lacks ephemeral messaging so I’m not sure if chat history is stored on client side once the server goes offline? I cannot find an answer through browser search or documentation. Couldn’t the hosted server be restarted anytime and it would essentially delete the metadata generated each cycle and chat history as well because the chat room would be deleted? Or ran inside say persistent Tails and with a device shutdown or unplug all data would be wiped due to its ram only nature while persistence only keeps the base setup of matrix not a full carbon copy so a new chat would be generated each power cycle. Similar to VPN services running on ram. Thoughts anyone?