I had a look at their blog page out of curiosity, not that you can prove much from the purported dates and text on a blog, which could be edited at any time.

The blog posts from 2010s are in a completely different style and written by a human: https://www.greyblake.com/blog/vim-preview-plugin/ https://www.greyblake.com/blog/how-to-install-firefox-icewea... https://www.greyblake.com/blog/unexpected-ruby-behaviour/ ...

This new blog post is clearly AI edited (probably 'improved' with AI), the old ones are not.