Yoast SEO is a huge paid plugin for Wordpress, so the founder not using Wordpress is at least moderately interesting, in a "cobbler buys shoes at walmart" kind of way.
I had no idea it was a product. I thought it was an SEO firm. That is a bit more interesting. But I also wouldn't be very surprised when a cobbler that makes work boots, buys sneakers from Walmart.
>wrote about how he migrated his personal blog from WordPress to Astro
>he’s since migrated again to EmDash
Do you need to know anything more about this guy? If that's one of the articles sources, I think you can ignore anything it says.