I agree. You have to be a certain age to remember that a big part of Microsoft "Longhorn" was WinFS (Windows File System), which was intended to completely rework storage into a relational file system (or object-oriented depending on your view). "Longhorn" was supposed to do away with NTFS and failed miserably at that objective. I believe that WinFS delayed things considerably and eventually didn't ship with Vista.

Microsoft Longhorn's failure to be the next big thing was largely due to the bad implementation of a storage subsystem. The result was Windows Vista, which was derided as a bad OS (at least until Windows 8). Due to that history, I would not name any file system 'Longhorn'. It may not be the same as naming a cruise ship 'Titanic', but you wouldn't name it 'Iceberg' either.