Is the irony lost on you? The technology exists but the leading proponents of diesel chose not to use it. Same with nuclear, sure there are pebble bed reactor

Is the irony lost on you? The technology exists but the leading proponents of diesel chose not to use it. Same with nuclear, sure there are pebble bed reactors and other safe designs, nobody proposes them on the industrial scale. Why is that? Efficient and cost impact profit.