>> ship code with tens of thousands of requests per second
Define "request"
If the "request" is to deliver some static file, that has been solved many years ago with CDNs and server caches and so on.
If the "request" is to do something other than static files, it has nothing to do with Web.
It could be request to your bank's COBOL app or a request to their Java app or to their Node.js app. Nothing to do with Web.