@CarlRosell @kentcdodds @Netlify @airtable Ha ha! I know the feeling.
I made a tool to generate that _redirects file based on the urls posted to @Netlify's forms API. This way the redirect happen directly at the CDN level so are crazzzzzy fast. But it's a bit of a toy/example project.
https://www.netlify.com/blog/2018/03/19/create-your-own-url-shortener-with-netlifys-forms-and-functions/