<ul data-eligibleForWebStory="false">New generations expect blazing speed with zero tolerance for delay when interacting with software.Research indicates that 0.1 to 0.2 seconds is the magic window for responses to feel instantaneous to users.Product leaders have shown that even small delays in software performance can impact user engagement and metrics significantly.Building software to meet the 200ms threshold for perceived immediacy is challenging but crucial for user satisfaction and product success.