My grandparents were never much into hip-hop and that stuck around. But my Mema actually has found some things to like about dub step, and apparently other people's grandparents have too. If that's not a sign of its staying power - I'm not really sure what is.
Peep this grandma. We'll call her quasi conductor movements with her hands 'dub fingers.'
And check out this grandpa getting down to Skrillex.
And this grandma getting down to Skrillex in the car.