Because there's a point where additional performance doesn't matter. Using C instead of Go is a mistake for all but the most performance critical applications.

Because there's a point where additional performance doesn't matter. Using C instead of Go is a mistake for all but the most performance critical applications. Use C for small pieces of code that need maximum performance. Use Go everywhere else. If you're writing a compiler, use Go: it's easily fast enough and very programmer-efficient. If you're writing SIMD convolution code, use C. For example, here is my compiler (written in Go) that generates AVX-512 neural net convolution code in C: https://NN-512.com https://NN-512.com For almost all purposes, Go is a better choice than C. Go is almost always fast enough by a wide margin, and the resulting program is easier to write and higher quality.