I don't think the decline of minivans is because of "uncoolness"; I blame the US auto industry that doesn't want to sell anything but SUVs.
Our family was shopping last year for a new minivan to replace our aging Odyssey--our kids are bigger now, but we still go on trips together. We looked for Siennas and Odysseys, but nobody had a good selection in stock, and the newer models felt more cramped with worse visibility than the old ones. I felt that we were not being given the choices we wanted and were being herded toward SUVs.
Our family was shopping last year for a new minivan to replace our aging Odyssey--our kids are bigger now, but we still go on trips together. We looked for Siennas and Odysseys, but nobody had a good selection in stock, and the newer models felt more cramped with worse visibility than the old ones. I felt that we were not being given the choices we wanted and were being herded toward SUVs.