I'll give you an example - My client has a high traffic website with over 300TB of bandwidth which is being served via cloudflare on a $20/mo plan (probably free plan also works well I guess).
Migrating this to Netlify would cost us roughly $6000 per month. (Netlify charges $20/1000GB). To me that's insane if you really want to adopt JAMstack.
For 6 grand, I can host an elaborate GCP setup with load balancers on compute engine. Or I can have a dozen instances on AppEngine all automatically handling my load for me. What am I missing?
This is not to say I don't like static sites - it's a different thing. I am 100% proponent of static sites, maybe just not Netlify.