Ask HN: Who is using C?

I'm a senior web developer that sometimes struggle with the over complicated stuck full of dependences that hide how the real technology works.

Sometimes I would like to do a step back and simplify the way I work, basically using just a few tools / language that have less ideas but that the power to do big things!

C is a language that can be easily to understand but very very difficult to master.

I'm very curious to knwo who is using it and for what!

Thank you :)