The median income has remained relatively stable over the decade, hovering around $110,000-$115,000. However, there was a notable increase to $121,296 in 2021, followed by a slight decline in 2022. The population has experienced minor fluctuations, with a peak of 14,662 in 2018 and a low of 13,297 in 2022. This recent decline might be attributed to various factors, including the COVID-19 pandemic's impact. Despite demographic shifts and population fluctuations, the area has maintained a high median income, suggesting economic resilience and continued attractiveness to high-income residents.

The median income in Islip is significantly higher than the national average, indicating an affluent community. The gradual increase in diversity, particularly the growth in the Asian population, aligns with broader national trends of increasing diversity in suburban areas. The stability of the Hispanic population at 14% suggests established Hispanic communities, which is consistent with demographic patterns in many parts of New York. The recent population decline might reflect broader trends of migration from high-cost areas to more affordable regions, a pattern observed in some parts of the Northeast following the COVID-19 pandemic.

In conclusion, while Islip remains a predominantly white, affluent area, it shows signs of a gradual transition towards greater diversity. This shift, coupled with maintained high income levels, suggests a community that is slowly evolving while retaining its economic strength. The coming years may see further changes in racial composition, potentially moving the area towards "Moderate Diversity" if current trends continue.