I am not sure why this was downvoted. Isn't it true, that cloud storage service is supposed to be used for cloud storage, and content delivery service is supposed to be used for content delivery?
Media content storage and delivery is an advertised use case [1]
> ...highest level of availability and performance is ideal for low-latency, high QPS content serving
And the cost using Google Cloud CDN isn't necessarily going to be a major improvement over Google Cloud Storage. Egress cost is similar depending on usage, plus you pay for cache fill and api calls.
