eventual-send-as-dx.md

If you have ever had to deal with Promise heavy code, and in particular deep data structures you will likely be familiar with code like the following:

const body = await (await fetch(url)).json()

This has a LHS RHS interchange that causes non-linear edits while writing code (especially with autocomplete):

fetch(url) // LTR
await fetch(url) // RTL, never seen autocomplete LHS await
await fetch(url).json() // Don't get autocomplete, don't .json(), BUG TO GO LTR need towrap
(await fetch(url)) // BOTH
(await fetch(url)).json() // LTR
await (await fetch(url)).json() // RTL

Compare with an eventual send approach of postfix based processing:

let body = fetch(url)~>.json()~>await

fetch(url)
// completion provider can give/discover .json -> ~>.json
fetch(url)~>.json()
// completion provider can give await completion
fetch(url)~>.json()~>await