The rolling cache was kinda pointless before SU5 (if you had good internet) yet now it’s essential to speed up redraw when looking around
I’m only using 4GB cache and it works great. I don’t intend to fly in the same places so no point storing all that data. Plus I read that setting the rolling cache very big can lead to problems. Manual cache has never worked for me, always CTD when trying to download an area.