I was so sick of being slapped around by LJHarb who claimed to me again and again that TC39 was honoring the Zalgo post (by slapping synthetic deferrals on everything) that I actually got Isaacs to join the forum and set him straight: https://es.discourse.group/t/for-await-of/2452/5
I feel like my deep dives into iterator performance are somewhat wasted because I might have made my project faster, but it's borderline dark magic and doesn't scale to the rest of the ecosystem because the language is broken.