Cloudflare has always been different than a generic CDN - their tagline is "The Web Performance and Security Company". Most of their features are focused on those things, and they don't really support video streaming / etc..

I agree with you and it's a mental model that Cloudflare isn't a swiss-army knife CDN.. They optimize for fronting web services (And do that very very well).

I use them on my personal site - but on the corporate side where we need TCP acceleration, edge serving of binary resources and POP presence in China - we turn back to crusty ole Akamai.

For giant files, you can at least break the file up into pieces. If nothing else, it's a greater technical challenge to build a caching system that scales to infinite GB. Why would Cloudflare invest in such a system when it's of dubious utility in the first place?