It's all tradeoffs. You can't have perfect security, _and_ store historical messages on the server, for example. But I use Matrix because I don't want ephemeral

It's all tradeoffs. You can't have perfect security, _and_ store historical messages on the server, for example. But I use Matrix because I don't want ephemeral messaging. Matrix found a way to get 99% of the security of Signal while giving me the features I need, and that's why I use it. Plus, I self host, which, in my opinion, more than makes up for anything else. Hell, I'd take storing my own plain text over E2E on someone else's server even.