I tried using secure chats but the UI is nearly unusable. E.g. secure chats are established between two specific devices and can't migrate, so it would make sense to let a currently "active" client (the one the user is currently interacting with) respond to an incoming chat request. Problem is, secure chats were being unpredictably picked up by random devices logged in to my account, so most of the time I couldn't even see any messages.