I think there's more algebra in frontend development. For example: CSS or SVG gradients, JavaScript animations and fades, the occasional clever data visualization. Heck, even the CSS box model?

Backend or frontend, if you use any quantitative metrics in your year-end performance evals, then some algebra is going to be helpful!

And you never know what will come up. I was once contracted by a regional government to write some code to correct hourly sensor readings (water levels in wells) based on a monthly manual human reading (ground truth). When it was done my boss remarked, "oh, this is just a linear transformation."

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".

Once you do actual programming instead of guess work, it does. Try evaluating performance of anything without algebra. Or without statistics.