Blog post: Changes to Rust's WASI targets

[yoshuawuyts]

This explains the upcoming changes to Rust's WASI targets, starting in Rust 1.78. This supersedes #1099. I put the post date in for 2024-04-10 (two days from now). Thanks!

cc/ @alexcrichton, @wesleywiser

[yoshuawuyts]

Talked to @alexcrichton over Zulip today, and he said it looks good. I shared an earlier draft with him last week, and the version I posted here already incorporated all of his feedback. He's currently traveling though, and can't directly approve it until he's back - hence this update.

[rylev]

I think we're burying the lead a bit here. This sentence might make readers wonder about why this post is on the main Rust blog instead of Inside Rust or even somewhere else. They may ask themselves "why should I read a post about a target I shouldn't use yet?".

The main story here is that there is a shift in target naming coming that will require user action, and we want to inform people as early as possible. I think that should be at the very top of the post. Let's make sure everyone knows as quickly as possible about what information they'll get from this post.

[yoshuawuyts]

@rylev Those are great points, thank you. Is this better?

[nikomatsakis]

Exciting to see the progress!

[yoshuawuyts]

Reviews went through a lot quicker than expected - I think we're good to publish this today. Thanks everyone!