You’re right. Irreplaceable was a stronger way of putting it than the original, I think, so that’s more my mistake than hers, and I think the contrast with user

You’re right. Irreplaceable was a stronger way of putting it than the original, I think, so that’s more my mistake than hers, and I think the contrast with userspace stands. mmap sits at this lovely intersection between virtual memory and the disk, and it’s been around for a long time. By now there are other means of playing within that nice intersection, but mmap is the pop classic.