This has been a thing for a long time with Vw. My 08 Gti service intervals were 16k km. Once the car got to 100k I did it every 10k since it had stage 2 tunning. Never had an issue.15k km or 1 year between oil changes. I'm still wrapping my head around that as every other car I've had was 5-6k km between oil changes or 6 months. What other intervals are you looking for?
2018 Alltrack is also the same I believe. 15-16k km or every 12 months. So far 12 months has always come first since it does about 10k a year.
Were you using conventional or synthetic oil in the cars you were changing out oil every 5-6k km?