I was not referring to the internal architecture of web applications inside an origin server. I was referring to the architecture of a web application across the various components (agent, proxy, gateway, server), connectors (client, server, cache, resolver, tunnel), and data elements (resource, identifier, representation, metadata) in the style.

The architecture of those interactions has remained fairly stable over the past 15 years, even specs that route around REST like WebSockets are trying to at least adopt the HTTP upgrade & tunnel connector (HTTP CONNECT) to ensure it integrates consistently with the style.