I had to learn a lot of linear algebra on the job that I kind of wish I had learned more of in school. Granted, I ended up doing graphics, which is pretty specialized. But I think it's safe to say that the number of programmers who have to know algebra and beyond is more than "virtually none".
Sure, but that's like someone who programs genetic assays saying you have to learn a lot of molecular biology to program. In the last 5 years I've been working, I've done a bunch of linear algebra for cryptanalysis. But in the 18 years preceding that, zilch.
