I've had barn doors on all our other vans, simply because the manufacture (Vauxhall) didn't have tailgates as an option at the time we purchased.
Buying into the VW brand was a huge decision because as a small business it's hard to justify the prices compared to other manufactures.
However, we justified this with 2 main reasons. First, I ordered a Kombi, so the vehicle is now multipurpose for my work and family life, and secondly the tailgate option meant that we can actually use this feature to shelter under whist working. This is a huge leap forward for us as a mobile business, because we'd sometimes have to cancel or re-schedule certain jobs because of the British weather, and now we don't.
So from a work/business prospective the tailgate option gives us far more flexibility.