I know what you mean, and most of the people I hire end up skewing older. For engineers, experience usually tames the "ooh let's try this shiny thing!" because they have had experience trying to maintain that beta JS framework or been paged at 3am to deal with their hacked together nightmare.

It is absolutely more rare to find younger people who are already aligned with that mentality. That's not good or bad, just a matter of fit.