If you already have a sizable library of addons on Kodi 18, the majority of those will be disabled once you update to the latest available version of the application. However, as noted in the introduction, Kodi 19 isn't compatible with many addons. There are also some new features and refinements focused on supporting modern video formats.
As one could expect, v19 brings a whole slate of fixes and performance improvements. The latest available version of Kodi is - Kodi 19 'Matrix,' released in February 2021.
What’s the Latest Available Version of Kodi?