So Far As I Know:
The turnaround shelves were a GE exclusive.
GE dropped them in the early '60s, because they were expensive to make. GE dealers were upset; the feature was beginning to gain really enthusiastic acceptance.
As with many "midcentury miracles," there was a downside to turnaround shelves - a salesperson pushing a competing brand didn't have to work very hard to show Milady how much interior capacity was wasted by turnaround shelves that didn't touch the interior walls.
And - speaking as someone who grew up with a '58 bottom-freezer Combination - they were not much fun to clean. This problem wasn't, strictly speaking, generated by the turnaround feature; it was caused by the need for strong, stamped aluminum shelves to make the turnaround feature possible. If a major spill occurred (and around my little brother, it happened frequently), getting all the spill cleaned out of the holes in the shelves could be quite the little project. In particular, I remember a pitcher of Kool-Aid that Little Bro knocked over while sneaking a swig in the middle of the night; he closed the door and walked away from the mess in an effort to hide his "crime."
By the time it was discovered in the morning, there was a sticky goo all over everything that was lots of fun to get off.