Comment Fusion "Success" Stories are Frustrating (Score 1) 182
Researchers can't sustain fusion for long periods (hours to days) and fusion reactions have only seen net energy gains for ultra short periods. Those "gains" are very modest on a percentage basis and measured very generously.
The science isn't close to sorted out. Once it is, engineering challenges of scaling and economics still loom large over fusion power and may take further decades to address fusion power is deployed displaces other generation sources, especially those using fossil fuels.
Clean, unlimited power is a worthy goal but if it arrives after 600 PPM CO2 and four critical tipping points, it is pointless. Resources would be better allocated to scaling up things that work now and at known and reasonable cost: solar/wind plus batteries, nuclear, consumption side efficiency gains, transmission upgrades and the most efficient NG peakers we can muster as backup.