Windows NT Kernel Mode Drivers

I found this site when searching for info on some specific undocumented NT kernel commands. (See previous references.) This tutorial is pretty cool. The weird thing is that the people who wrote this, who are Russian, do all their drivers in assembly language. I remember way back on Win16 (Windows 3.1), some people did asm drivers, but nowadays I thought everyone used high-level languages. Weird, but cool!