"Email is now an oligopoly, a service gatekept by a few big companies which does not follow the principles of net neutrality."
"One strike and you're out. For the rest of your life."
It's true that today's anti-spam measures are ruthless and block ranges of IP addresses permanently without easy recourse including residential IP addresses, etc. So your self-hosted mail server often finds it's e-mail is undeliverable, especially to anyone else using a Big Tech mail service.
The suggestions are at the end of the article and centre around softening the approach to anti-spam measures, with less permanence.
Will Big Tech listen and make it easier for individuals and self-hosters? Probably not, as the pendulum has swung their way with the ability to block automatically.
E-mail is not really complicated to host and has been a basic Internet service since the beginning of the Internet. In theory, many could be (technically) hosting their e-mail from home with their own domain names, and that way moving their e-mail wherever they go.
You have the right and freedom to host your own e-mail, but it may be a difficult road to travel.
See
After self-hosting my email for twenty-three years I have thrown in the towel. The oligopoly has won.#
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BigTech 
Many companies have been trying to disrupt email by making it proprietary. So far, they have failed. Email keeps being an open protocol. Hurray? No hurray. Email is not distributed anymore. You just cannot create another first-class node of this ne
