My main reason is I found a couple of builds I wanted to try and create in survival, the easiest way to find out the amount of each block you would need, total footprint ( area needed) is to use McEdit.
Secondly Archival purposes (for when I'm stuck offline and or lacking inspiration or looking for something too build)
I was expecting that response.... still a surprise tho. Thats a shame. It would probably have been managable to just bundle it with every Gensokou release....
i'd of though it'd of been reset every so often due to MC updates breaking builds..