[habitue]

This is a Stage 0 proposal. Basically it means somebody with a connection to the TC39 (the committee in charge of the JavaScript standard) has thought this was a good enough idea to put together into a proposal.

In terms of chances of standardization, that's a step up from "Hey, I have a great idea", buy there are plenty of Stage 0 proposals that go nowhere because they lose steam.

I think the metric they look for is who is using the Babel plugin for it. If people are doing that, then they it has a better shot of progressing.

Stage 4 is the "this is getting standardized next time" stage

[pjmlp]

Even Stage 4 isn't granted it will end up on the standard, some proposals have died on Stage 4.

[shados]

Any example? Since stage 3 is roughly "request for implementers", and Stage 4 requires 2 real world implementations and essentially mean "will be part of the standard in the next wave".

The closest thing I can think of is ES6 modules, because the module loader spec wasn't finished, but the syntax still lived on.

Now, stuff getting kicked down from Stage 3, that has happened.

[pjmlp]

I was wrong, on my mind I was thinking SIMD has been dropped during stage 4.