Ok, let me revise my statement: the cognitive load of the requirement is only negligible in comparison to the frustration not including the requirement would ca

Ok, let me revise my statement: the cognitive load of the requirement is only negligible in comparison to the frustration not including the requirement would cause. Apple puts the disk space requirements in every single installer. Disk usage is an important piece of information. I'd agree with you if it were something like "Ubuntu requires a Pentium II or higher".