I don't think The Time Machine
really works as an example there, because the time machine itself was not the only science-fictional element. The book was intended as a speculative extrapolation about the future evolution of human society, a social commentary about the dangers of class divisions taken to extremes, with the machine merely a means to propel the allegory and speculative futurism. So the SF wasn't just about the time machine, it was about the whole conjectural portrayal of the future of humanity, even the death of the Earth once humanity was long gone. Changing the nature of the machine wouldn't change the fundamentally science-fictional mindset of the novel.