VW specs. that could do 30k km dates back to VW502.00 but only on certain markets. That standard does not have anything to do with oil, but specific market. VW determines OCI based on specific market. In Europe, even within EU you will have different recommendation by VW or other manufacturers.The standard for VW's specs starting about 12 years ago (since 504/507 came out) isn't that they can handle a 10k interval. It's that they can handle a 20k interval (actually, 30k kilometres). Not all markets take advantage of the longer interval due to types of fuel in those markets, or other factors. But in many markets they are approved for 20k intervals, or two years.
Additionally, until the newer spec 0w20 oils recently came out (508, LL-17FE+ etc), Euro specs had a much higher HTHS requirement than standard API oils. A 5w30 meeting the main euro specs would be still be minimum 3.5 HTHS.