I think that a big problem is that the engine designers and body designers never talk to each other. A bigger problem is that engines now have so much crap on them that they are not meant to be worked on by anyone other than pros with expensive tools.
I used to have a bunch of air cooled VWs. On one of my bugs I could pull the engine out, by myself, outside on a hill, with one jack, in 5 minutes. I could put it back-in in 10 minutes. I would pull the engine just to do a lot of routine maintenance, it was faster and easier.
eskimo