[s1mon]

It really depends on the types of objects you're trying to look at and why. The one thing that the article gets right is that turntable makes sense if the object has a natural Z orientation. Things like buildings, furniture and automobiles are obvious examples. Hand held objects get viewed from all different angles, and tumble (or trackball) makes more sense. Some of those objects may have a typical rest position where there's a natural up orientation (e.g. a computer mouse), but they can easily be rotated and viewed from arbitrary angles.

Any decent CAD system will support both turntable and tumble, defaulting to a user-selected choice, with easy options to override the behavior and switch to the other.