Once upon a time in the mid-2000s, there was an architect named

AutoCAD 2006 was sold under a perpetual license. Users who own a legitimate license feel entitled to use the software they paid for, without being forced into the "Software as a Service" (SaaS) model.

Using unauthorized software for professional engineering or architectural work compromises the integrity of the output. If the portable environment crashes or corrupts the virtual registry, project files (DWG) can become irreparably damaged.