There has been no technological breakthrough that has affected Olympic swimming?

While there have been advancements in swimwear technology, such as the introduction of full-body suits that enhance buoyancy and reduce drag, these innovations have sparked controversy regarding fairness and regulation. The debate over the impact of technology on performance continues, as governing bodies like FINA have implemented rules to limit the use of such suits to ensure a level playing field. However, training techniques and nutrition have also evolved, contributing to improved swimmer performance beyond mere technological enhancements. Thus, while there may not be a single groundbreaking technology, the cumulative effect of various innovations has significantly influenced the sport.