The Great Lakes region has a surprising concentration of advanced manufacturing skillsets. With large manufacturing facilities with extremely stringent quality standards like a bleeding edge chip fab there's going to be a enormous need for people with traditional manufacturing-specific support skillsets that are simply not available in large quantities anywhere else in the US.

If the current administration's support of the transition to electric vehicles doesn't falter, that's going to drive an increasing need for microprocessors in vehicles. Intel locating themselves in central Ohio puts their production facilities on an interstate highway hub that puts them within a 6-12 hour drive of nearly every major auto manufacturing facility in the US, which is an enormous incentive for the auto manufacturers to source from them. Additionally, Columbus has the Rickenbacker International Airport which is a dedicated air freight airport that lets them get their product global faster.

This announcement of two facilities makes me think that Phoenix is going to be a smaller facility handling the more advanced, smaller run chip designs, but host the R&D and design offices (To take advantage of the city's concentration of tech talent) while Columbus is going to be the primary production facility.