> TBH the "ZIRP overhiring" seems like the most likely real reason. I could never understand how all these companies could hire so many people for so much money, only to have them work on later-to-be-canned open source projects.

I agree this is the root cause, also a big reason for inflation are all these do-nothing white collar management/tech jobs subsidized by the post-pandemic money printer with fat paychecks burning holes in their pockets. Of course these companies tried to use the free money to grow when they could, now they want to fix the balance sheets. And AI is a great excuse, especially if you're in the business of selling AI products!

It's why Trump wants to turn the money printer back on, inflation be damned, because mass unemployment due to belt tightening would be politically even worse than inflation.