[saulpw]

Companies do waste time on interviews when they don't really want to hire, for numerous reasons. 1) To test the labor wage pricing of the market, 2) for legal or tax or optics reasons (in order to get cheaper H1B labor you have to have been trying to hire domestically for the role), 3) to placate someone internal (cheaper to perpetually pretend to be hiring than to actually hire).

I'd bet there are others. It's easy to imagine that "companies don't waste time" but companies waste time and money all the time. The bigger the company, the more waste.

[throwaway-0001]

Yes, but from the hiring effort what you said maybe is 10-25%. Any reason for this to increase in the last years to justify so many rejections? TBH I know many people that changes jobs in last 24 months just fine.