This book has no reason being this good. Tanith Lee's The Silver Metal Lover (1981) should have been a train wreck of a book, a totally misconceived notion with no possibility as working. As a teenager, I passed up this book many times, the subject matter looking uninteresting to me. In a way, I was right, because at that age, this book would have been beyond me. Now, however, she riveted me from beginning to end.
The story is almost entirely interpersonal, a romance, not of the modern romance arc, where the happily part is mandatory, but more like the romance of previous decades, where an entire arc of a tragic relationship would be followed. That doesn't mean that the ending isn't satisfying, it just means that the ending gives us closure in a different way than the happily ever after.
I felt particularly riveted by the first person prose style, which drops us solidly into the character's idiosyncratic point of view and kept us there, through all her changes, both internal and external. Jane is a spoiled rich brat, but not really, still capable of growth beyond herself. Her friends are varied and almost mythic in their portrayal, some more obviously than others.
The world most resembles that of Blade Runner, which hearkens back to Metropolis, with the absurdly rich living high up, and everyone else living low down, where the rich simply can't comprehend the everyone else part. In particular, the rich's fear of violence is out of proportion to the actual dangers of the world. This resemblance is reinforced with Silver, the robot that Jane loves, and the story's examination of what a robot lover means. How human are they? Is a human's love for a robot real? Given the imminent production of real sex-bots, the question is of even more importance today.
You won't find any shooting or starships in this SF novel. The fate of the world isn't at stake. In fact, the fate of nothing is at stake, except for that of Jane and her lover.