This definition is not very precise though. For example, I think it can be argued from this definition that we had already reached AGI by the year 2010 (or earlier!). By 2010, computers were integrated into >50% economically valuable work, to the point that humans had mostly forgotten how to do them without computers. Drafting blueprints by hand was already a thing of the past, slide-rules were archaic, paper spreadsheets were long gone. You can debate whether these count as 'highly autonomous', but I don't think it's a clear slam-dunk either way. Not to mention dishwashers, textile weaving machines, CNC machines, assembly lines where >50% is automated, chemical/mineral refining operations, etc.

The definition reminds me of the common quip about robotics, "it's robotics when it doesn't work, once it works it's a machine".