If Justin Bieber, Travis Scott or Kim Kardashian are anything to go by, then the latest must-have in interior design is a modular sofa, specifically the Dune by Pierre Paulin. Designed nearly 60 years ago in collaboration with Herman Miller, this space-age couch is enjoying a new lease of life thanks to its cool design, versatility and promise of exceptional comfort. Back in the real world, modular furniture is experiencing a renaissance beyond the living room. “Modular furniture first gained...