There is still more desire than supply. It is worth it to those who wish to drive it, even when it gets benched for winter, as mine is.
I really have a hard time associating costs of ownership with this car. I have too much fun with it. When something breaks I pay to have it fixed as that is the price of ownership and I am champing at the bit to get it back on the road again to have more fun!
These cars are still very much lust worthy items for those who wish to have amazing experiences.
I know of one here in Vermont who has the M3W and it has barely been driven. It is cherished and cared for and cleaned obsessively as a collector's item. I'm sure the owner is looking forward to his ROI but in the meantime he is not driving it and loving it. Driving it is the whole point. It exists for no other reason. I find assigning a cost/value basis to be a hopeless exercise in futility. If we allow the mindset of Consumer Reports to take over then there is no fun allowed. There is no column on the spreadsheet for that datapoint.