Its a long time coming…
it seems like years
Because it is a lot of work. Those involved were attempting to get the main API dictionary corrected first. But if you have a tutorial to share, you can fork the GitHub SketchUp Tutorial repository, add your tutorial and make a pull request.
Obviously the API docs are low priority, and teaching programming is super duper way low priority for Trimble (as it was for Google,) as it’s not a revenue generator.