Must UNIX be a memory hog?

[flint at gistdev.UUCP]

90% of the time when it comes to a choice between using disk space and using
time, I'd rather use up the disk space.  The same goes for memory.  The only
thing you have to be careful about is that the amount of disk space or memory
being used might cost you in execution time.  (Like when it causes swapping.)

Extra disk capacity is cheap: labor costs are not.  If someone created a UNIX
that ran twice as fast but needed twice as much disk in order to run, they'd
have a lot of customers.