I don't know what the future holds for widespread adoption of Lojban.
Neither do I know if it will yeild measurable scientific insights. I
enjoy speaking a language that has so much functional elegance. In the
real world, we have to be compatible with everybody else even if the
existing monopoly is something defective. For me I like to imagine
what native Lojban speakers would be like in a world where
longstanding traditions are discarded for that which has the most
intrinsic merit. I go into more detail on my page about why I am
learning Lojban:
http://www.nemorathwald.com/Why_Learning_Lojban.htm
-epkat