i think you're opinion may be biased. i have a touring bike for touring (much better for touring than a bd), a commuting bike for commuting (much better for commuting than a bd), a trailer that your bd couldn't touch with a 10 foot clownpole in terms of cargo capacity, and the passenger point is weak at best. kiddie trailers, trail-a-bikes, bakfiets, having your child ride their own bike, perhaps.