Back in the day, when accuracy wasn't a big issue and some adjustments were made to models to account for motorization and moving parts, there were volumes of material gathered so your intermediate modeler could "up his game" and accurize these dinosaurs into the masterpieces that advanced modelers created.
Most of those old kits are more collector's items now. Newer kits are nearly miniaturized versions of some actual museum vehicle. Your average modeler can build a highly accurate model straight out of the box and as long as the basic building skills are done (seams, gaps, alignment, etc.), most kits are judged on the skills of the paint job.
Even today, when a new kit is released, there is a rush to review the kit and point out inaccuracies. Most build reviews involve some sort of adjustment that the builder finds necessary. It's almost like the new philosophy is "no one builds out-of-box anymore."