[userbinator]

One may wonder why the filesystem driver doesn't have cycle detection, but the fact that filesystem structures are generally considered trusted data, a cycle detection algorithm would add overhead and complexity, and the inherent (4GB) limit means that this is something better left to an application like chkdsk/fsck.

FAT is still the most widely used, lowest-common-denominator, non-proprietary filesystem so it's not going away anytime soon.

[amenghra]

It's proprietary in some way: it's patent encumbeted (lookup Microsoft vs TomTom and Microsoft vs Motorola).