I wonder if am in a third camp. I like to implement everything from scratch (compilers, TCP/IP/arp/rarp stack, databases). But I like to use recommended librar

I wonder if am in a third camp. I like to implement everything from scratch (compilers, TCP/IP/arp/rarp stack, databases). But I like to use recommended libraries, not my own code. By implementing everything myself, I have a ready list of questions about how certain problems were handled, and a firmer understanding of where to look when the software misbehaves.