Re: Old skool
what is relevant now that will get you a job
I think you're confusing University with Technical College, though, to be fair, the Universities of today are probably complicit in your confusion.
If you still want a job in twenty years time when the "defunct OS's" are those of today, or want to be able to contribute to the technology of the future, you need to learn some of the fundamentals. The priniciples of OS design haven't changed a great deal since Multics.