Still amazes me that people actually spend time on such things :D. Decompiling 100 year old software whose source code most likely didn't look much different from what the decompiler spits out. What's the point?
Let me just say this. Although not a complete restructuring, it's a TON more readable than a bog-standard decompilation of the ROM. This is something you'd know if you spent 10 minutes reading it.
Mods! Much easier to modify source code than a compiled binary.
What I am saying is that it doesn't surprise me people do these projects, what surprises me is that enough people care about them for it to make the front page of HN.