Earlier quoted context omitted.
From 20+ years of experience and having seen tons of trends just die, most are just that, hype.
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.
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).