If you look at how much has been discussed about the topic, it seems that there is very few builds going on in EG, compared to more traditional materials.

Why is this?

Is the material itself so hard to work with, compared to the more traditional construction materials? Or not so much hard to work with but outside most peoples technical scope?
Is it that is seems only to be suitable for heavy machining equipment, like for milling steel, so it is not a suitable choice for routers?