[jgrahamc]

1. It's easy to maintain/update the code because it is pushed once to Cloudflare and you don't have to worry about browser caching effects on JavaScript delivered to the browser.

2. The performance of the code will be much higher than in the browser because of the server resources available and also because and subrequests will happen across Cloudflare's fast/reliable links and not whatever the end user is connected to.

3. The end user has control over what JavaScript is executed and might use a tool like Disconnect to block external scripts preventing the code from running at all.

4. Security: you can include things like API keys.

5. Script starts executing earlier.

6. Conserves bandwidth/battery life of mobile users.