This is the article you quote:
In the article, this is mentioned:
if V-SYNC is “On,” G-SYNC will revert to V-SYNC behavior above its range, if V-SYNC is “Off,” G-SYNC will disable above its range, and tearing will begin display wide.
The key here is ABOVE it’s range
If you limit your FPS to your monitor’s max refresh rate, you will not get tearing and V-SYNC is not needed.
From the same source but different link:
G-SYNC + V-SYNC “On”:
G-SYNC reverts to V-SYNC behavior when it can no longer adjust the refresh rate to the framerate, 2-6 frames (typically 2 frames; approximately an additional 33.2ms @60 Hz, 20ms @100 Hz, 13.8ms @144 Hz, etc) of delay is added as rendered frames begin to over-queue in both buffers, ultimately delaying their appearance on-screen.
So again, why would you want to introduce input delay with V-SYNC ON ? Instead, limit the FPS.
Note That was also published post 2015:
Published Jun 20, 2017