You probably have Swift in the same niche... and more elegant, not completely ignoring the last few decades of language research etc. If you want something more minimalistic there's Zig. D is just "C++ + hindsight", nothing special, only extra fragmentation of dev ecosystem by bringing in another language.

Ofc, Apple is not MS, so Swift developer experience and docs kind of suck (if you're not in the "iOS bubble" where it's nice and friendly), and multiplatform dev experience especially sucks even worse...

And "easier to pick up and code in" might not necessarily be an advantage for a systems language - better start slowly putting the puzzle together in your head, and start banging up code others need to see only after you've internalized the language and its advanced features and when (not) to use them! It helps everyone in the long run. This is one reason why I'd bet on Rust!