I'm a huge fan of Netlify, everything you guys do is great.

We (Graphia) took a similar approach for our document management system. Essentially it looks and acts like a regular CMS but it sits on top of a git repo instead of a database; and publishes via Hugo.

It's not intended to be a fully-fledged CMS but the API would support it without much work; the UI is definitely the time consuming portion.

http://www.graphia.co.uk for anyone who is interested, not quite ready for prime time just yet. Soon.