I agree. Also every software engineer should have written a compiler, a scheduler, a device driver, a small kernel, an IEEE compliant floating point library and

I agree. Also every software engineer should have written a compiler, a scheduler, a device driver, a small kernel, an IEEE compliant floating point library and a 3D raytracer in their free time between 30 courses by the time they have completed their degree! /s Writing a filesystem from scratch is something I would expect from a full 5 years degree entirely dedicated to operating systems, not a generic SWE curriculum