Too much detail can bog down any story. Enough with the history of gunpowder, the geology of Hawaii, the processes of whaling, and cactus and tumbleweed.
One of the bedrock principles of physics is the conservation of energy. In this universe, energy can be neither created nor destroyed.
Lots of science fiction deals with distant times and places. Intrepid prospectors in the Asteroid Belt. Interstellar epics. Galactic empires. Trips to the remote past or future.
A funny thing about near-future stories: the future catches up to them. If the author is unlucky, the future catches up faster than the book can get out the door.
What SF author or fan isn't interested in human space travel? I've yet to meet one.