Depending on your definition, this actually is not peak performance.
Subways are.
Obviously, the tunnels are absurdly expensive, but nothing moves as many people as quickly around a city as a subway.
They’re also extremely reliable, meaning people are even more likely to actually use them, and their above-ground footprint is essentially zero.
The genre is usually divided into “soft” and “hard” fantasy.
Cyberpunk is generally considered hard fantasy, as is stuff like The Expanse or Interstellar.
Star Wars is unabashedly soft SciFi, it’s a straight Fantasy story in space.
Star Trek is a half-breed - it pays some lip service to scientific “plausibility”, but much of it stretches that envelope beyond the breaking point. Scientific accuracy was never the point of the series to begin with.