I agree with that.Without going too far off course...
Yes, there are people who buy minivans for whatever reason.
Yes, there is a market for heavily optioned minivans.
I think there are plenty of people who need a minivan or even don't NEED a minivan who will buy them, sure.
Minivans are bought for a utilitarian purpose; their entire purpose is to maximize efficiency. R-Class, in that regard, had several things going against it.
1) It wasn't really a minivan; if it was, it was a terrible one (poor space efficiency=not maximum possible efficiency=not utilitarian)
2) It was expensive (more expensive than it had to be=not utilitarian)
Luxury cars inherently aren't utilitarian. Minivans are utilitarian. Do people with minivans maybe like luxury? Probably. T&C has a premium feel to it, so sure, why not? Is it out of the realm of possibilities that wealthy people will buy minivans? Of course not.
Bigger families need more vehicle. Most vehicle for a family? A minivan.
Vulnerability to poverty increases with family size.
A decent number of people who buy minivans probably aren't laughing all the way to the bank every pay period.