How old is this article? It talks about client to server encryption like it is some sort of optional thing. >Today you expect a messenger to be a database. I

How old is this article? It talks about client to server encryption like it is some sort of optional thing. >Today you expect a messenger to be a database. I do? Not all of us want the levels of resource utilization this approach requires. Why would I want to be able to edit/delete old messages? I can just send new ones.