LOL I'm sure I know why. That being said, here are the first 4 articles when I was looking for a study (I forget where) that looked at preschool's impact:
https://news.mit.edu/2023/study-preschool-gives-big-boost-college-attendance-0208
https://www.npr.org/sections/money/2021/05/18/997501946/the-case-for-universal-pre-k-just-got-stronger
https://www.npr.org/2022/02/10/1079406041/researcher-says-rethink-prek-preschool-prekindergarten
https://learningpolicyinstitute.org/press-release/what-does-research-really-say-about-preschool-effectiveness