It depends on your lifestyle, but we have only two kids and cannot live without our minivan! We do a ton of carpools and road trips, including camping, and the van is totally full. We also find it handy when we have guests, but an 8th (removable) seat would have been nice when we had two families of four. We have a lot of tourist attractions within two hours so we tend to drive together, and we have guests who do not drive in the U.S. so we end up taking two cars since we lack that 8th seat. I realize this is not useful for most. It's also useful to have the space when we have to haul small furniture and so on. My friend's SUV hardly has any trunk space. We carpool and the older kids have huge backpacks, so even though they have eight seats there is just enough space for their backpacks and nothing else, but they have a roof rack for long roadtrips. They cannot store large suitcases in the SUV because of the lack of space and the fact that they have a family of six. It would be okay for a smaller family.
Look around and talk to families with older kids, and also consider your situation.
"Friendship is born at that moment when one person says to another, "What? You, too? I thought I was the only one." C.S. Lewis