The post discusses the advantages of bicycles equipped with two gear internal hubs and dual chains, highlighting their mechanical simplicity and aesthetic appeal. Comments suggest that alternative solutions, like Sturmey-Archer's flip flop hubs, also provide innovative gear-switching mechanisms. Users appreciate the clean design these systems allow, as there are no cables to manage. Historical references to the origins of such technology indicate a revival in interest, particularly with SRAM's recent innovations in this area. This trend reflects a growing consumer demand for functional yet visually appealing bike designs.