But calling everything that's new "hype" and pointing to the past as the only things that are "real" or "solid" is also a form of groupthink.

Yeah, but I think it's the inverse kind of groupthink than what the industry suffers from.

So it's healthy to embrace it as counter-balance to the constant hype.

(Besides, whether something is "real" or "solid" I think can mostly be answered in hindsight -- when it's mature enough and tested enough. In which case calling only things in the past solid is prudent).