Basically all the issues listed in the article apply equally to Matrix, and most other communication platforms too. There are some alternatives that overcome m

Basically all the issues listed in the article apply equally to Matrix, and most other communication platforms too. There are some alternatives that overcome most of the issues with a "serverless" approach (hint: no practical communication protocol on the internet is ever truly serverless), such as Briar. However they generally have UI/UX and feature limitations that are impractical barriers to mass adoption. If you're concerned that your communications may be specifically targeted, you should definitely consider carefully what solution meets your needs and security in the context of your threat model. Sometimes this might be self-hosting, or a pseudonymous XMPP account accessed via Tor, Signal or Matrix, or Briar, or something else. What we need are good factual unbiased guides to inform people about the practical and security properties of various options. Unfortunately this article is not in that category.