To continue discussion (Champion needed) Improve handling of network data:
Proposals: JSON.parseBinary and ArrayBuffer.prototype.detach
I should mention that I posted them in Proposals category, while Ideas was the right one.
So you can look at these proposals, probably the initial discussion as well and ask any questions. Currently I am looking for TC39 delegates, who can champion these ideas. If you are one of them, you can reach out to me here, on GitHub, email.