API page: https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Condition...
> todo WARNING: The condition API is going to receive some additions before release.
That's hopelessly out of date. Release happened years ago!
The issues referenced in the text need to be checked -- are they still in progress and might they land in a future 8.x release, or have they been discarded? -- and the TODO updated accordingly.