Phil Windley doesn’t get WS-MetadataExchange:
I’m just not clear on why a simple URL isn’t good enough. Why do we need to invent new RPC-style request/response pairs?
The reason is simple: It’s because of a conscious decision not to depend on HTTP. And I’m becoming more and more convinced that this is the wrong path. The more I read and think about it, the more convinced I become that ignoring what HTTP and REST offer leads to re-inventing the same functionality on another layer.