SAP integration with Outlook

As this story from IT Toolbox says why did it take so long for SAP to have meaningful integration with Outlook?

If you use Outlook a lot you will be able to get access the SAP HR information. This is a fantastic step. Full appointment, taks lists, email, contact and other Outlook data will have linkages with SAP. Without too much information I can only assume training calenders, leave schedules, and workflow tasks etc will be available in Outlook.