One thread they're touching on that I think is healthy and good is the DIY aesthetic, and the resistance to tools and media that primarily serve to make you a passive consumer, and to choose and live ones values more consciously & proactively. These features are (or ate least were) prominent in the punk scene, but also in many other subcultures including many religious groups.
I am glad to see "the kids" continuing to question & challenge and try to take more control of their own lives, so this is great in my opinion. A bit of pretentiousness is a small price to pay in my opinion.