Ubuntu 19.10 is of course a normal version rather than a long-term support version. Therefore, the support period of this version is relatively short. According to Canonical, this version will end support on July 17th, 2020. Security updates are not available, so users who still use Ubuntu 19.10 need to take the time to upgrade to Ubuntu 20.04 LTS.
The Ubuntu 20.04 LTS version provides support for up to 10 years. Therefore, users do not need to worry about support issues within a short period of time after upgrading the LTS series. Of course, users can also actively upgrade when the Ubuntu 20.10 version is released.
For users who like to pursue new versions and new features, this is not a big problem. After all, the new version may have been upgraded as soon as it is released, and those who do not like frequent upgrades recommend using the Ubuntu LTS series directly. Provide stable security updates without worrying about having to upgrade in a short time.