Same here '17, Luckly mine doesn't leak although I'm aware of the issue and park under covered parking at work and garage at home although the first 2 years I didn't park in garage and it rains a lot here in Washington. One issue though is during the summer running A/C and at night when it's cooler and A/C is off, if I don't have fan turned up and blowing mainly tru defrost (W/warm air) sometimes my windshield will fog up which is very annoying (not anything like a leaking S/R though) . I got 'service bulletin" about S/R drains recently and having that (fix) right now , I was told by service rep they cut drain hose at angle which supposedly helps prevent blockages? We'll see. Either I'm lucky or it's just a matter of time. This is a major issue though and VW should have #1. designed a better roof/drain system #2. Stop denying owners with this issue, and man up to their faults. Stuff like this (and diesel gate, and carbon build-up on valves, and, sound system disconnect issues and,and,and) have made me lose faith in this company.
Sad thing because I've exclusively owned either VW's or Audi's since 1975 and you'd have thought the sunroof issue would have been solved in this day and age.