Why are most of the biggest open source projects in C? [closed]

Answer 1

I can list a couple more reasons

1. C code produces more compact object code. Try to compile 'Hello World' as C and C++ program and compare the size of the executable. May not be too relevant today but definitely was a factor 10+ years ago
2. It is much easier to use dynamic linking with C programs. Most of the C++ libraries still expose entry points through C interface. So instead of writing a bridge between C++ and C why not to program the whole thing in C?