I've heard of D. It seems like a great idea, but all that stuff with proprietary compiler, poor online documentation, and zero public approval from any organization (except Facebook but it's lately) were a big no-no for my side-projects, keeping aside any commercial ones.

Now, Rust seems to be the perfect drop-in replacement in my heart for "new language that makes coffee while being readable and awesome to use".

You're right. D, just two compilers and only few well written books is terrible when compared to the biblical legacy Rust has built up. And I certainly wouldn't want to use anything that didn't come out of a big corporation. Organic growth for anything technical just means the technology sucks.

Sarcasm aside, I get what you're saying but not why?

Wasn't D fractured around two completely incompatible standard libraries? What ever happened there?

It was fractured a few years ago with D1. D2 (now just called D) resolved those differences and is almost a new language at this point. Think of D1 as a long term test with D2/D being the do-over that most languages don't get the chance to try. Jettison the bad and add good stuff that had been talked about but could't be easily be done w/o tons of breaking changes.

Trust me, it will fail