[e12e]

> never noticed that mmap is limited to a ~256MB window on most 32-bit architectures

That's interesting, but processing more than 4gb of data on a 32bit systems seems pretty niche, these days? Where do you find them outside of industrial embedded applications? I think even my long discarded smart watch ran 64bit.

Now, vfat filesystems will bite you (Esp for removable media), but that's also fixable with some other fs, like xfat or zfs.