just quietly even 44k cars is fk all compared to some of the older classics. And as RBN1 said there are a lot of people in the world.
Considering these cars probably won't peak in value for another 20 years we have a long way to go. But look at how much movement the R32 GTR's (let alone r34) have done in the past few years.
in 2011 i paid $12,000 for my GTR. It's currently insured for $40,000. And we have only just seen the tip of the iceberg rise. Honestly if in 20 years 32's don't push well past $500,000 i would be quite surprised TBH (honestly we are probably looking at a much higher figure). Now remember that figure wouldn't be worth what $500,000 is in todays money due to inflation and shiz. But basically i would expect rare models (the N1s, Nismos etc) to fetch over $1 mil. When you consider the average house price will probably be 1.2-2mil by then depending on where you live you start to get a figure of costing. Keep in mind i'm being pretty relaxed on those figures. Currently projections will be much higher than that.
TL;DR i would expect my 32 to pay off my mortgages in 20 years.