[guitarbill]

Some software for storage products is C. I imagine other conservative industries could be similar.

But I have also heard that although the senior devs would prefer to stick to C for technical reasons, they have started to use/embrace C++ for hiring reasons (since many grads are taught C++). So I wouldn't be surprised if finding "pure" C codebases/ones without C++ is getting harder. The eco-system around C++ (e.g. test frameworks) certainly seemed healthier. It's been a few years though, so I might not have a good picture any more.