These are optimized and ready for use. You should buy `m5.xlarge` or higher for authoring. Delivery does benefit from being `c5.large`.
If you're going to run serverless, consider one authoring (or two if a stateful cluster), and 4 stateless delivery nodes in a scale-group. If serverless, you'd want to use 3.1.4+ (build from `develop` or wait for the final release soon).
--sumer