That level of programming gave such rewarding moments in between difficult debugging sessions. When I wanted to test a new kernel driver build I needed to walk into some massive room with all of these interconnected machines that emulated the non-yet-fabricated GPU hardware. One of the full time people on my team was going insane trying to track down a memory corruption issue between GPU memory and main memory when things paged out the entire time I was there.
Back then the stock was around $7/share and the CEO announced a 10% paycut across the board (even including my intern salary) and had an all hands with everyone in the cafeteria. It's pretty cool they went from that vulnerable state, with Intel threatening to build in GPU capabilities, to the powerhouse they are today.