D is a refreshing language in the sea of "alternative to C languages", they didn't reinvent the syntax, so if you come from C, using D will feel very natural and at home! (and you'll be protected from most unsafe/ub quirks of C)

When it comes to metaprogramming, it's excellent, but it is a double edged sword, it can be useful, but if abused it'll tank your build speed, so one must find a proper balance to avoid pain later

One of the few languages that offers its own backend! (LLVM/GCC backends are also available)

I love this level of independence, a real labor of love, one of the best better C, i'd even say this is the evolution C needed