A few explanations: - the "current hot thing" is usually something bogus that requires token effort (it's more about signalling to the market "we do that too")

A few explanations: - the "current hot thing" is usually something bogus that requires token effort (it's more about signalling to the market "we do that too") so doesn't need much experience until it actually gets real. - the new hires are cheaper, while the existing staff was starting getting dangerously more senior and more jaded (and thus demanding more, and seeing through the bullshit grind culture more) - the new grad hires also come familiar with the latest "hot thing" for free