On the lightning itself: Some of the consulting offers I got in response to the post on dev hiring strategies were... interesting. I didn't pursue any of them, but they showed the world is a weirder place than our whitewashed walled gardens make it out to be.
I'd certainly agree that the most "professional" (polished? well-written? organized?) writing I read these days is on Substack. In five more years, that writing will inevitably be found on a new platform that displaced Substack which bumped Medium, which ate Blogger, etc. Any bets that Evan William's next business will also involve publishing people shaking their fist at clouds?