For sensible and conservative people, their household NW would be more than $5M before they buy those type of cars.

For the showoff, with no sense of long term planning (for their future/retirement), their NW could be anything from $600k to $1M and they would think that they deserve those kind of cars.

We belong to the ultra conservative type. With over $6M in HH NW, we are still happily driving our mass market Jap cars - just that my wife and I have our own car. And it makes a lot of sense too. Jap cars are efficient and reliable and come with a lot of new tech features!