I think the more important change that Tesla made is the change in the databus. Much higher performance ethernet. They changed the whole architecture of the car where there are now very few point to point connection, and its all essentially routed with a few major modules in each part of the car.

If you look at current cars there are sometimes huge cable bundles, lots of individual cables for everything. Its a nightmare to build up and very hard to install.

I think in their next generation assembly they will have these connection points be fixed and then just plug different sub assembly together at predetermined points. No more huge cable harness installed on completed bodies.