My understanding on the advantage for the VRAM change is that RAM gets priority over VRAM. If the systems needs more RAM, it will allocate the VRAM to RAM, and then reallocate back to VRAM, over and over. Increasing the minimum VRAM both keeps the VRAM from dropping below 4GB during high RAM demand and reduces the system swapping RAM between VRAM and RAM. That swapping back and forth can cause stuttering, which is the main thing the VRAM change is trying to fix.
My understanding on the advantage for the VRAM change is that RAM gets priority over VRAM. If the systems needs more RAM, it will allocate the VRAM to RAM, and then reallocate back to VRAM, over and over. Increasing the minimum VRAM both keeps the VRAM from dropping below 4GB during high RAM demand and reduces the system swapping RAM between VRAM and RAM. That swapping back and forth can cause stuttering, which is the main thing the VRAM change is trying to fix.