German renewable energy sources supplied 55.9% of the country's power last year, exceeding a 1993 industry forecast that capped potential at just 4%. This represents a fourteen-fold increase over what incumbent electricity companies once deemed an absolute ceiling for renewable generation. The disparity illustrates how established industries often underestimate exponential technological change by extrapolating from early-stage adoption curves. Similar patterns of perceived limits transforming into speed bumps are currently observable in the electric vehicle, cryptocurrency, and artificial intelligence sectors as they transition from impossible to inevitable.