Just to add a bit from the perspective of a CS faculty.
UChicago CS is growing at an exceptional rate, and effectively pulling in the best faculty from schools around the country (not just newly minted PhDs, but the top faculty at other well established CS departments).
Every year since MikeF joined UChicago, there have been some “signature” hires that have dramatically increased the reputation and stature of UChicago CS. 2017 saw the arrivals of senior faculty in network/security. 2018 saw the arrival of Becca Willette (ML expert from Wisconsin, generally top-10 in CS rankings). In 2019 (this year), it was just announced that Nick Feamster and Marshini Chetty will leave Princeton to come to UChicago CS. Note that these are all in addition to great hires of young junior faculty. UChicago CS expects to draw more of these star faculty from highly regarded CS departments in the years to come.
In contrast, Northwestern and UIUC are hiring at a much slower rate. While NU has a lot of resources committed to growth in the CS+X initiative, the actual growth has been fairly gradual.