When I read this I can help but feel the energy inefficiency of the self-admitted [1] "billion dollar mistake" that was adding implicit nulls to the C language (and thereafter many other languages).

A bit broader: I wonder how strong typing can save energy! Maybe it makes compiling more energy consuming, but a bug in production costs a lot more energy than a few extra rounds of compiling.

Very hard to get data on. But would totally change the ranking of proglangs by "efficiency".