I was tinkering with 2 of my Hugo-based blogs this afternoon and loving it. I have two complete copies, each using a different theme. (I know, but switching themes is almost more work than copying Markdown files). One is currently on baty.net and the other is just sitting there. I thought for a minute I prefered the older one. We'll see. Also, writing blog posts in Emacs and Org-mode is pretty great.