Exposing structured clone as an API?

Has anyone ever proposed exposing the structured clone algorithm directly
as an API? Katelyn Gadd was musing about fast deep copy in JS on Twitter,
and I proposed a hack to use postMessage to do so[1], which works but it's
a little roundabout. Since structured clone is a primitive that the web
platform is built on it seems like a primitive that ought to be exposed. I
know this exists in other languages (Python has copy.deepcopy[2]) and
there's an npm "deepcopy" module[3] with lots of downloads so this is
clearly something people use.

-Ted

1. https://twitter.com/TedMielczarek/status/591315580277391360
2. https://docs.python.org/2/library/copy.html#copy.deepcopy
3. https://www.npmjs.com/package/deepcopy