Well, not quite true - they did tell us about the Formit Converter add-in. There was a checkbox for it during the install process, and if I remember correctly the default setting was ticked so that it would install automatically.
But I am delighted to see that the following add-ins have also been automatically installed in Revit 2018:
- Batch Print
- Model Review
- Worksharing Monitor
In addition to this, we obviously have Dynamo & Dynamo Player, which are now properly incorporated into the Revit install, and can be found on the Manage tab, alongside Macros (logically), instead of being stuck on the add-ins tab.