Lack of budget, and more importantly, lack of any really good reason to go back. We BTDT 50 years ago. Moon is small potatoes, Mars is where it's at.
I'm disappointed it took so long for this to come up.
Yeah, it's pretty freaking amazing. This is a satellite launches before I was born, based on technology from a day when simple transistors had barely been invented, and the circuit technology was less sophisticated than what most of us have running our old beater-ass trucks. A whole bunch of smart guys figured out how to not only get that thing out into space, and predict where it would go, but also outfit it to be able to last longer than our species is going to be around. It just goes to show what humans can actually pull off when given sufficient resources, motivation and support.
I find the Golden Record thing to be quite hilarious in a self-centered kind of way. They included sounds of all parts of earth and humanity, which are totally meaningless unless you have the experience to know WTF they are. And more importantly the probability of any alien life form bein gable to recognize sound/compression waves in the same frequency as us is pretty much zilch.
IMO the best part of the Golden Record has nothing to do with aliens, but actually a very interesting study in what one group's notion of what symbolizes our planet and humanity.