Of course! Many, many algorithmic intensive applications are written in C/CPP. Low-level applications are as well. As just one example, most algorithmic Python

Of course! Many, many algorithmic intensive applications are written in C/CPP. Low-level applications are as well. As just one example, most algorithmic Python libraries are actually implemented in C/CPP. Not to mention any memory-intensive or real-time software, e.g. embedded systems - most of those are running on C/CPP, and plenty of new embedded systems are created every day.