Okay, first of all--I love it. Thanks @ncw. You make the world a better place.
Three semi-related things:
Is there a way to cap its size? https://rclone.org/memory/ doesn't give much detail
How does this handle using more than the physical amount of RAM in a system? Will it move the contents of your ramdisk to swap?
I'm seeing lower copy performance from my SSD to the memory backend than I am seeing SSD to SSD. Is this expected performance or does it warrant troubleshooting on my end?