"Email's been here for years. But the reason Substack wants you to call your creative work by their brand name is because they control your audience and distribution, and they want to own your content and voice, too. You may not think you care about that today, but you will when you see what they want to do with it."
My position about Substack is very transparent, always has been: I don't touch it. Everything that's on Substack is inaccessible to me. By choice.
https://www.anildash.com/2024/11/19/dont-call-it-a-substack/