You created the first "better C" out there to get any traction, it had a perfect name (B -> C -> D), but due to factors that were partially [2] outside your control [3], D's niche got eaten by Go and Rust.
[1]. The D programming language. [2]. I've seen people blaming the D to D2.0 transition, but D was a niche language before too. I've also seen people blame D for not having an Open Source compiler for years, but neither did Java, and it took off anyways. [3]. Such as Sun's marketing, or the general push to scripting languages between 1995-2010 (such as perl, tcl, PHP, Ruby, Python and Node)