More Words, Deeper Hole

I'm surprised no one has picked up on pellet propulsion as the way to make the story move fast, fast, fast. OTOH, is there any evidence that most of the people who care about this sort of thing aren't mostly old guard? The younger folk (defined as under 40), are either perfectly comfortable with FTL for plot reasons while acknowledging it's so much nonsense or plain just don't care all that much about fast space travel.