Sounds and gestures that were evocative of youthful rebelliousness at a particular point in time, would have to be blessed with exceptional qualities in order to be perceived as timeless.
One might look back at an era and wonder why a way of doing things could have been regarded as edgy or counter cultural. So much more is taken for granted in the present moment.
And so it shall be for the cutting edge trends of today. Would it not be interesting to live to see a time in the future when they shall be regarded as quaint?
Some folks are gifted with the ability to make things that stand outside of time. Are they working with forces of nature?
Privilege, deprivation or petty bourgeois values have little to do with this feature. All we can do is encourage folks to be themselves. Energies and urges produce the magic.