Can confirm they do. I worked at a company that was producing control systems for electric engines. Great environment and fun job but the code was beyond redem

Can confirm they do. I worked at a company that was producing control systems for electric engines. Great environment and fun job but the code was beyond redemption. 15k line files with 2k+ lines #ifdef statements that ran different code for different customers, some variable names were just curses against pushy clients, not a single abstraction in sight. Not only they exist, they power massive machines that could crush a person in the blink of an eye.