I'm 60, and have never used any calculus on the job. I did need to relearn some linear algebra when doing game programming, but these days most of the heavy lifting is done in the game engine for us.
Nothing I've done on the job involves deep computer science. There are people who need to know that stuff, but they are specialists. Building CRUD servers or web frontends uses very little of what I studied in college, beyond basic understanding of data structures and algorithmic complexity.
I'm glad I learned CS, and wish I had learned more of it, but it should not be a requirement for getting a code-monkey job.
