Cloudfront is replicated over the globe so downloads are way faster for
the end user (and it also lowers our bandwidth costs).

Cloudfront aggressively caches files by default (default TTL is 24
hours), however this is not an issue here because we implement a
git-based versioning system on huggingface.co, which means that we store
the files on S3/Cloudfront in a content-addressable way (i.e., the file
name is its hash). Using content-addressable filenames means cache can't
ever be stale.