When you go down to true 1x or close to it, it allows you to use binocular vision. That's one of the strongest benefits of a 1-6 or 1-8 versus a 1.7-X.
If I remember correctly, a 375HH with a 100 yard zero and a 300gr bullet has about 29" of drop at 350 yards and 43" at 400 yards? The firing solutions required to shoot farther are the limiting factor long before magnification zoom becomes the short leg on the stool.
In more than a dozen safaris and about 50 animals, shooting plains in the Tuli circle, velles near the Matopas, or hunting the beaches of the Zambezi valley for Waterbuck and Bushbuck, the longest shots I've ever encountered were 347 yards for a bushbuck, 231 yards for an impala, and roughly 250 yards for a Hyena. Loads of stuff in that 180 yard range, which of course was easy to accomplish at 4x zoom with great clarity in a good scope. (Klippspringers, Zebras, Steinboks, loads of impala, etc.)