From the article: > The -233°C threshold (40 K), often associated with the McMillan limit, marks a boundary beyond which conventional superconductivity theorie

From the article: > The -233°C threshold (40 K), often associated with the McMillan limit, marks a boundary beyond which conventional superconductivity theories become less predictive. So it’s like finding a gas giant exoplanet that’s in the “wrong” place. We understand Jupiter and Saturn. We don’t understand a gas giant orbiting its star in ten days. Thats weird. And science can’t progress when there is nothing “weird”. It means all the data matches our models. It’s boring. It has nothing to teach. A ten day orbit or a normal metal group superconductor are outside our comfort zone and may mean new physics.