This a good question. When the day comes I get a 40, I thought about ABS. Unfortunately, there is no such thing as aftermarket ABS. Hmmmm..I sense a business opportunity. I should dig out my old microprocessor programmming books and put my engineering degree to good use (does anybody still use Fortran-77?)
I also figure traction control would be a good addition too...and there's no shortage of aftermarket out there to accomplish it.
Joe