Until a couple of years ago, cargo nets were "standard equipment" on a large number of vehicles.
In December of 2000, I purchased a 2001 Ford Escape XLT and the cargo net came with the vehicle.
I traded up to a 2003 Ford Escape Limited and to my surprise, the cargo net WAS NOT standard anymore. So, I kept the one from the 2001 and put it in the new one.
I'm now driving a 2005 Ford Focus ZX5, again, cargo net NOT standard and again, I kept the same one from the original 2001 Escape.
When car makers are deciding on how to "cut corners" and save money, I wish they would first consult the people who actually buy/drive the vehicles for their input. I would think that a cargo net is something almost everyone would actually use in day to day driving, and I for one would gladly give-up some other feature that I would seldom or never use for the sake of reducing production costs. In my opinion anyway!