Technically every http method can have a body? But the specification says the semantics are undefined on get and any compliant implementation is free to ignore it.
replyOr any compliant implementation is free to not ignore it like istio/envoy, infrastructure tooling, etc.
replyWhat is the use of spec adherence if it leads to unusable/broken applications.
QUERY, added in 2026, does not resolve existing or legacy applications.
replySticking to RFC is one thing. Advertising as node compatible is completely different altogether. Many people cannot see the difference.
Atleast a flag would suffice as that would ensure existing infrastructure tooling doesn't break while keeping the RFC spec folks happy.