> > Because FAT is a very impractical file system > That apparently doesn't seem to matter as it is supported almost everywhere... they've picked some of the m

> > Because FAT is a very impractical file system > That apparently doesn't seem to matter as it is supported almost everywhere... they've picked some of the most featureful ones, but I think there is much to be said for simplicity and ubiquity since that is what really enables data interchange. That's true for filesystem choice, but the ubiquity of FAT has nothing to do with "Practical [or impractical] Filesystem Design". You can't sit down and design a filesystem with "installed everywhere" as a feature; things which are everywhere have already been designed, new designs aren't installed anywhere to begin with.