RE: Why Isn't HAF Used More?

Rocks DB uses RAM, not disk on Hive nodes, right?

That's the part I don't understand all that well...
It clearly can't use only RAM, as it's in the TerraBytes for a 'full-node'.
You can manipulate where what is stored on OS level, I guess...
I remember using something like RAMdisk... But I just copied that and never understood how the OS deals with this stuff in the background.