With the exception of a Postgres offering (they went with SQLite) and what sounds like some sort of built in CMS, Cloudflare has all of this. I don't mean in a glue together your own Dropbox way but in a nicely integrated verify your GitHub profile, pick a repo, get automatic deployment and serverless functions that just work way. The same way Vercel is being described.

My understanding is that Vercel is built on top of Cloudflare and charges a significant premium.

Presumably people are paying that premium for the unspecified "nifty performance optimizations" for Nextjs and not for the CMS and Postgres. Has anyone gone from Cloudflare to Vercel that can speak to the differences they found?