Old developers are wary of frameworks and assume something about them will end up biting them in the end; they are wary of using features they haven’t created. Young developers assume that frameworks and tools work, use them without hesitation, and are surprised when things go wrong.
The truth, as usual, rests somewhere in between.
I think there’s more worry on the part of older developers about maintaining the code over time and more worry on the part of younger developers about getting the feature done quickly. Younger developers trust that frameworks and plugins will be maintained and updated, whereas older developers see each component as a potential point of failure.
(Those of you who were readers of my old blog may remember from my post on Ageism that I’ll be turning 28 soon, which probably seems old to some developers. ; )