> "Using GET with a Body works"

Except it doesn't. Some API gateways outright strip request bodies from GET requests to prevent them from being forwarded.

It sounds like most people with the "just use GET" nonsense are far from having any experience in cloud computing.

QUERY won't be supported by them either.

So, change is required. Just change GET to allow for body and move on.

Most of the systems that are blocking GET/body could be easily tweaked to allow it. Today. As is.

QUERY will likely need firmware updates, core engine updates, etc.

Meanwhile, tweaking GET is a rule change.