What do you mean by edge first?
[2] https://rauchg.com/2014/7-principles-of-rich-web-application...
There's also a real question of whether Vercel and Netlify are really at the edge when they’re mainly running in AWS, GCP etc data centers rather than deploying their own hardware at edge locations, ISPs etc.
Don't get me wrong I think Vercel and Netlify are interesting but they seem to talk about being ‘on the edge’ while they really aren’t ATM