Mohair has lived in homes for longer than in wardrobes. Mohair velvet — sometimes called plush — has covered theatre seats and train benches for over a century because it barely wears out.
For a modern home, start small: one mohair throw over a linen sofa, in a single strong colour. It catches light in a way cotton never will, and it will still be there in twenty years.
That’s the slow interior: fewer things, made of better material, kept longer.