Understood that there are substantial differences among options regarding amount and quality of available data on environmental and health effects throughout fluid production/deployment/recycling/disposal lifecycles.

I do believe that across years, commercial thermal-management offerings are making incremental progress toward better working-fluid options.

I also think that although details are highly implementation-specific, benefits of two-phase DLC relative to two-phase immersion could include potentially smaller total working-fluid volume; and potentially less human exposure to working fluid and vapor during routine system operation and maintenance.

The absense of news there has been bugging me for a while, but it seems a recurrent issue in IT reporting (although it could be far more general): certain failed hypes just don’t get explained for complete lack of press and good explanations are hard to come by on the open internet (while naive rumors abound).

The HP memristor and “the machine” were another one that was seriously hyped at the very highest level and then died a death so quiet, you’d never know what or who killed it.