I suspect rust isn't referenced because these things play out on the scale of years, and rust is only 1 year in, so it'd probably be premature to judge. Sure,

I suspect rust isn't referenced because these things play out on the scale of years, and rust is only 1 year in, so it'd probably be premature to judge. Sure, it's a good source of ideas, but it's too soon to really have enough data to judge the results. These other languages have over a decade behind each of them.