Ok I admit,

I shamelessly copied the title from this excellent article http://libregraphicsworld.org/blog/entry/whats-up-with-dwg-adoption-in-free-software If you are interested why we don’t have DWG support in LibreCAD, then the article is a perfect read for you.

Alexandro did very deep research on the subject and wrote the article, thumbs up!

Now go and read that article!