But it is a problem. And also a difference in philosophy. NTFS gives the user and the process the guarantee that the filesystem will remain consistent. Also as a user, I have a guarantee that the file I have open, represents a file that actually exists on the file system, and not a deleted file.
This is not relevant to the on-disk filesystem, just how the OS handles files.
The philosophy is also flawed: open a file, then create a hard link to it. You now can't delete that hard link (because the file is open), even though you just created it. This is not a problem on POSIX because it correctly distinguishes a file name (represented by a directory entry) from a file (represented by the inode).
Its not clear to me what "flaw" you're referring to. NTFS is reference counted and can easily accommodate other behaviors. By default, it prevents deletion, unless a process specifically permits deletion, in which case, the file can be deleted.
This makes a whole lot of sense to me as a user, because I don't want to worry about open files being possibly deleted from disk.
>open a file, then create a hard link to it. You now can't delete that hard link (because the file is open), even though you just created it. This is not a problem on POSIX because it correctly distinguishes a file name (represented by a directory entry) from a file (represented by the inode).
Nothing like not being able to delete a directory because Explorer is keeping the folder's thumbnail database open and in use even though you are no longer in the directory.