The appeal of using a static site generator is that its output is, well, static. Deployment is something simple like copying some files to an s3 bucket. If I need to host an app for the CMS portion, I'm not any better off than using wordpress or another full suite CMS. It's also not clear to me from the docs what responsibilities the content creator have in the workflow (in my experience, teaching github or markdown makes things a non-starter most of the time)