Early buses are cool because they are simple, and simple is beautiful. As the years went on buses became only slightly more complicated but work, drive, and CAMP, a LOT better! The first time I drove a bay bus I was amazed at how it drove, compared to a split it drives like a "real" car! Has anyone here camped in a Vanagon Westy? Holy shit man, I know they are not anything cool to look at, but fuck me they camp REALLY nice!! If you want the best split camper, then look no further than a 67 Westy. You're set, you're done. Not going to get any better than that.
Bottom line, VW learned a few things over the years. There's a lot to be said for progressive refinements.