i don't think they put it back. It's handy for clearing rain or snow off the rear windows backing at night. I don't need a large area cleaned off, just a small area to peek thru. And yeah like the spare tire we can find ways to do without, but better when they are with.
Everything has a rear camera now. Mine also seemed to be clear of snow when needed. Sedans also made do without a rear wiper long before the camera came along. The wiper is nice at times. Those times just seem less often though. I found the interval speed of it for my flat back wagons and hatches too fast.