From the first introduction of Core Web Vitals, Google has maintained that these user experience metrics will keep evolving. Since 2022, the Google team has been testing Interaction to Next Paint (INP), a new interactivity metric, and asking for feedback from the development community. Late in 2023, they announced that INP would replace FID as a Core Web Vital. The transition to INP is effective from March 2024. Instead of optimizing for the first interaction (as required by First Input Delay), Interaction to Next Paint will require teams to optimize interactivity overall, measuring all interactions throughout a page view.