Earlier quoted context omitted.
Skimming through the doc, it looks like a modification of FAT32 with some (noticeably more complex) extensions, and not anything resembling what you might envision a "FAT64" to be; a FAT is still a linked list of 32-bit entries, there can still be two of them, and directory entries are still 32 bytes each (although defined in a rather complex way.) There's a separate allocation bitmap, which seems redundant and a was…
With how slow modern day NTFS is for things like node_modules (lots of nested directories), I can't help but hope some better file system will become widespread on the next major Windows release.
EDIT: See here - https://github.com/Microsoft/WSL/issues/873#issuecomment-425...