On the other hand, the FreeBSD bootloader is written in Forth. Per installation, the Denver Airport luggage handling system was massively much more complex, but that doesn't make one terrible implementation representative of the entire language. Good things can still be well written in languages that aren't C.

http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/boot/forth/

And for some sources for the Denver Airport claim:

http://developers.slashdot.org/story/05/08/27/1634255/Denver...

http://www.44342.com/forth-f381-t4059-p1.htm

Edit: it should be noted that the mechanical side of the baggage handling system was extremely complex, and at the beginning was prone to breaking.