Well, it means they can take a load off building the back story. Tell me it’s “2035”, and I imagine that things are mostly the same. The US still exists, Russia is still a mess, and Disney is still making Mickey Mouse crap.
Tell me it’s hundreds or thousands of years in the future, or even just “unspecified date”, and I have to wonder why all the cultural touchstones are the same. So you either have to explain why nothing has changed, or show how everything has changed. If all you really want to do is tell a good story about trying to stop a rouge Saturnian ring from destroying Washington D.C., that’s a pain in the ass.
A neutron star, which turns out to be inhabited by tiny sentient aliens who evolved under immense gravity, is discovered in the constellation Draco by Earth astronomers in 2020 in Robert L. Forward’s 1980 sf novel Dragon’s Egg.