[jcranmer]

Go was first publicly announced in November 2009, Rust in July 2010.

[kibwen]

At the time of its announcement, Go was tremendously further along in its development than Rust was at its own public announcement. Knowing modern Go, you can go back and understand Go code from 2009. Knowing modern Rust, trying to read code from 2010 is essentially impossible.

[justthistime_]

I wouldn't say "further along". Deciding to not tackle any medium-to-hard problems just allowed them to be finished far earlier with their language.