Can't remember the exact featureset of the popular D one (because boy, was there many languages called D and E and so on over the years in the 80s/90s), I'd say to be a car it needs both temporal and bounds safety at the least but faintly I remember D being a bit of a kitchen sink? Wasn't there 2 standard libraries for a while? Were they even coherent in style/used language features?

There's one standard library now, it has great C/C++ interop, and the language features make more sense to me than C++, go, rust, Java, even Python.

If Rust is gaining popularity because it is an alternative to C++, D-lang needs to be included into that conversation, IMO.