This. A RAM based cache sounds substantially more performant. I think this may be for clients that can't do much more than swap hardware to make their setup f

This. A RAM based cache sounds substantially more performant. I think this may be for clients that can't do much more than swap hardware to make their setup faster. Either it's a lack of control over their OS setup, or a desire to fine-tune caching for a specific device, or a lack of ability to change existing settings.