So, I studied C in college and really enjoyed it. It really fit my style of thinking at the time (having a mental model of what the machine is doing is really v

So, I studied C in college and really enjoyed it. It really fit my style of thinking at the time (having a mental model of what the machine is doing is really valuable). I wrote a game in C/OpenGL, but really didn't learn much about "modern C" or much of the ecosystem other than doxygen/make/gdb. These days I primarily program web services and iPhone apps in Ruby, occasionally using Java for performance issues. Is there any good reason for me to further my C knowledge?