Oof. I was surprised for a second that Babel would simply put "var" in there instead, when it expressly doesn't do the same thing. But then I realized that emul

Oof. I was surprised for a second that Babel would simply put "var" in there instead, when it expressly doesn't do the same thing. But then I realized that emulating block scope without let would mean wrapping all blocks in anonymous functions, which would carry significant overhead. Gross.