Its amazing how much fashion dictates how manufacturers have to design cars.
Case in point. The current trend in sedans to have easily removable top loading diffs. The engineers hate it. They say it increases the chances of building a tweaked car and makes the car tweak easier when it takes hit.
The Yokomo YR-4 series and the Schumacher SST series sedans were like that in the mid 90's. We got away from that and the cars were solid. Now its 10 years later and we are back where we started with the same problems.
In 1/12th the trend was battery adjustability and Narrow, Narrow, Narrow... Centralize mass at all costs. Guess what...the fast guys run thier batts slammed as far back as they can get them...ALWAYS and now they are running wider chassis cars.