I think you might be missing the point here. You are right that using RAM is preferable to using disk; however, nobody is talking about disks here. Using a lo

I think you might be missing the point here. You are right that using RAM is preferable to using disk; however, nobody is talking about disks here. Using a lot of RAM is bad because it makes you slow: pretty much everything, from paging to hash table lookups, works faster the lesser data there is to process. Minimizing RAM usage is a very worthwhile goal if you want to be faster.