Although I agree with your point, both the article and your comment suffer from different use cases + threat models. I'd agree that there are no real alternati

Although I agree with your point, both the article and your comment suffer from different use cases + threat models. I'd agree that there are no real alternatives to (regular) mail and email where longer form asynchronous communication can occur without the expectation of an instant reply. Unfortunately when it comes to this form of communication the reality is that there aren't any widely used alternatives that don't leak as much metadata as email.