Yes, stainless steel is about 4x more expensive, but that ends up being about 2% of project cost. This is a big win long term, if the owner is looking that far ahead.

Right now, the main use seems to be concrete bridge replacements of bridges over saltwater in climates that use salt for de-icing. Oregon built one 20 years ago, Montreal built one last year. When you're replacing a bridge because corrosion destroyed it, it's not hard to justify stainless.

The price is coming down as the volume goes up.