I remarked that nextcloud has a link under section “Support” for Chat that points to matrix / riot-web
Wonderful choice!! Thumbs up for that.
Now it would be fantastic, if users could edit under their profile settings their personal matrix id
in form of @server:name.matrix.domain so that others could use this way of contact.
I saw only twitter, email, website to edit.
Love matrix / riot so - would be very happy to see this raising - as nextcloud use it itself anyway