Everybody here seems to be focusing on the negatives, but there's also a few positive legacies from the Itanium architecture, all of them on the software side:

Everybody here seems to be focusing on the negatives, but there's also a few positive legacies from the Itanium architecture, all of them on the software side: EFI which became UEFI (like it or not, it's still better than the legacy BIOS), the GPT partition table format, and the C++ ABI now used for all architectures on Linux.