"Central IT" as a concept no longer really exists - or at least we can say it has diminished significantly. A decade of layoffs, outsourcing, budget restrictions, and organizational restructuring have reduced any central IT to a shadow of it's former self. Who does the CIO report to? The CFO. Or there is no CIO.
Lines of business therefore have to fend for themselves. This is not a new concept as central IT traditionally was slow to deliver. They had a big "ship" to turn in terms of managing enterprise tools and maintaining control. Shadow IT systems were always rampant. Tableau and other similar vendors are catering to shadow system, line of busines users and they are winning. Right place at the right time.
So the news that Oracle dropped off the Gartner grid is not surprising at all. They were late to the cloud and held onto the enterprise model for too long - hoping that this would all blow over as a fad. The only hope the Oracle has in the BI space is there BI Cloud Service offering - which is based on industry standard for business intelligence reporing - Oracle Business Intelligence. It's going to take time to gain traction, but let's not forget that Oracle has a massive client footprint with the Oracle Database, Oracle E-Business Suite, and other technologies. I think we will see Oracle re-emerge in this new market in the next few years - but it may take longer to get back into the upper right quadrant.
-My humble opinions