Ubuntu 22.10 with the codename "Kinetic Kudu" was released on October 20, 2020.
Ubuntu 21.10 Impish Indri has been released on Oct 14, 2021, and it is available for upgrade from the previous version of Ubuntu 21.04 Hirsuite Hippo.
Many of us have a dual operating system installed in our PC. Windows uses NTFS file system while Linux uses EXT4 and other file systems. You can mount NTFS formatted drive in Linux, but you can't mount Linux based file systems in Windows. So, we have to store the files that need to be accessed in both Operating Systems in an NTFS formatted drive.