I was a bit confused what this adds other than just standard CDN-Cache-Control page caching that we do now. Some quirks I've found;

- You still get billed per request, whether the request hits cache or not (but don't get billed for CPU time)

- You now get billed for static asset requests! This makes no sense to me. "One thing to watch: when caching is enabled, requests that are normally free — static asset requests and worker-to-worker invocations through service bindings or ctx.exports — are billed at the standard request rate, because each one now consults the cache in front of your Worker." Yeah that sounds like a bug that just happens to generate them more money.

- The cache key automatically has the worker deployment version, so even gradual deployments populate their own cache which is nice

- It seems like you can set a totally custom cache key? But that was previously Enterprise only, can't see if that's still the case here.