John Gruber:
"My advice to any writer looking to start a new site based on the newsletter model would be to consider Substack last, not first. Not because Substack is a Nazi bar, which I don’t think it is at all, but simply because there are clearly better options, and the company’s long term goal is clearly platform lock-in."
https://daringfireball.net/2024/11/regarding_and_well_against_substack