> C really is mainly for fast performance and low level systems stuff, and anyone who tells you that you need to understand OOP garbage to write systems code 

I haven't seen any real system level code in any sort of OOP, I'm sure it exists, but very rare from what I can tell. The best case is Arduino libraries really what come to mind, and that's just so things feel more comfortable to a broader range of developers. OOP is a core of CS fundamentals in college (or at least was the whole time I was there). Only the EE and CPE people learn in functional stuff because thats all we used.