Funny enough last night I was hoping more old 90s Microsoft code got open sourced and I somehow was living under a rock. Maybe one day I'll get to legally dig through NT 3.51 code. especially since it was ported to MIPS and Power iirc. I went on a huge tangent reading about how someone ported leaked ntvdm code to x64. They didn't provide code and I didn't go hunting for the leaked stuff and won't...but I think it's super neat how forward portable some of the stuff NT has is.