Or, as I said above, what’s the benefit of knowing calculus at all? Every once in a while I’m grateful for having taken stats. I don’t even think I apply algebra 1 in my life ever. Pre prealgebra with compounding interest formulas and percentages, which are available online I do, but otherwise the most I ever use is basic arithmetic (3rd grade in the US), which I can do in my head but I also have a calculator in my pocket to do for me.