This article compares it to CDN services, which specialize in static file hosting. Static site hosting is just static file hosting with a different marketing strategy and behind-the-scenes workflow.

The real disappointment here is Cloudflare, which manages to be among the slowest despite their supposed focus on performance.

Google Cloud Storage manages to be significantly faster than Cloudflare, while serving files publicly is "just a feature" (like for S3, which trails the pack).