Fast. Quality Factor (Q): the metric to measure the energy-efficiency of integrated circuits; a dimensionless parameter, ratio of dynamic energy to energy dissipated per cycle. Quality Factor, Q, is the definitive, essential, fundamental, physics science-based on Landauer?s Principle, E dispp/heat = kTln2, measurement of ICT energy-efficiency. Todays LowQ = 1 Diabatic semiconductor speed/frequency/performance is limited by heat/thermally challenged/limited. Adiabatic CMOS @300Kelvin HighQ > 3000 is not thermally limited. Can dissipation scale better than linearly with speed? Some observations from Pidaparthi & Lent (2018) suggest Yes! https://www.mdpi.com/2079-9268/8/3/30/htm For ultra HighQ > 5000 superconductor @4Kelvin AQPF