Many details of the program remain under wraps. However, it frequently included videos of encounters between American military aircraft and mysterious objects that defied explanation, such as 'aircraft' that flew at high speed or hovered with no apparent source of propulsion. Also, it wasn't a source of shame for the politicians that supported it. Reid said it's "one of the good things" he did before he retired, while the late senators Daniel Inouye and Ted Stevens also backed the program.
It's not known what conclusions the program has reached. With that said, this doesn't mean that officials were expecting to find aliens. Reid said in 2009 that there had been "highly sensitive, unconventional" discoveries, and one briefing the same year claimed the US couldn't defend itself against what it had seen. However, that may have just meant that what was found couldn't be readily explained by natural phenomena or other known aircraft, and was curious enough to warrant a deeper look. Former program lead Luis Elizondo would only say that the sightings didn't clearly originate from specific countries.
The program probably isn't going to see a renaissance. UFO research understandably has plenty of skeptics who see it as misguided and a waste of money. However, that it has been happening in a significant capacity this century is still notable in itself.