(And I agree with people's comments that how much of a utopia it really is is up for debate, especially if you don't agree with Banks's views on economics & society. But to me his own personal intent was very clear.)
> Orbitals, while enormous (greater surface area than earth), are much smaller. The Culture novels do have Ringworld-sized rings as well, though. E.g. from Consider Phlebas, flying under the orbital Vavatch: "It was like flying upside-down over a planet made of metal; and of all the sights the galaxy held which were the result of conscious effort, it was one bested for what the Culture would call gawp value only by a big Ring, or a Sphere."
> Musk by naming SpaceX rockets after Banks’s tongue-in-cheek Culture ships (“Just Read The Instructions,” “Of Course I Still Love You”)
Those are not the names of the rockets, but the ocean barges on which the rockets land.
https://theculture.fandom.com/wiki/List_of_spacecraft
>Legacy: The autonomous spaceport drone ships Of Course I Still Love You, Just Read the Instructions 1 & 2, operated by SpaceX, were named after General Contact Units mentioned in The Player of Games, as a posthumous homage to Banks by Elon Musk.[11] The construction of a fourth drone ship, named A Shortfall of Gravitas, was announced by Elon Musk via Twitter on February 12, 2018.[12] It is named after the Experiencing A Significant Gravitas Shortfall, a ship mentioned in Look to Windward and Matter as a GSV and GCU respectively.
Although the barges are less glamorous than rocket stages, they are reused more times, and so are more permanent a tribute.
Thanks for reading btw!