I see some people arguing that "you should use a dev/staging environment with a public IP" instead of having ngrok tunneling traffic directly to your local dev

I see some people arguing that "you should use a dev/staging environment with a public IP" instead of having ngrok tunneling traffic directly to your local dev box. When you're editing HTML/CSS, you don't have to run a deploy script before checking how your markup renders. Ngrok gives people writing web services the same convenience when dealing with requests from a 3rd party on the Net. It is the equivalent of saving your HTML/CSS source files and instantly seeing the changes when you reload your browser. I just wrote a little proof-of-concept Alexa app that crawls HumbleBundle ('Bundled Goods', very much beta quality at the moment) and ngrok was invaluable for developing it quickly.