Perhaps. But in the 80's, C was the most practical language to use on the PC, by far. And porting C code to other platforms was easy.
Niche experiments having features doesn't accomplish anything, but adding just one more feature to C seems plausible.
With C++ people could point people to another production ready language compatible with C that people could use, so there was somewhere they could do and an example of the feature working instead of someone promising silver bullets in theory.
I thought it would be a couple months to add C++ to my C compiler. 10 years later...