The point is that it requires TLS handshakes to be done in a multi-threaded system for a server handling high concurrency.
Many servers are multi-threaded, but many are not. Using the proposed technique in a Node.js process, or nginx, is going to severely limit the number of new connections per second.
Many servers are multi-threaded, but many are not. Using the proposed technique in a Node.js process, or nginx, is going to severely limit the number of new connections per second.