Thank you, rsc, for all your work. Development in Go has become much more enjoyable in these 12 years: race detector, standardized error wrapping, modules, generics, toolchain updates, and so on. And while there are still things to be desired (sum types, better enum/range types, immutability, and non-nilness in my personal wishlist), Go is still the most enjoyable ecosystem I've ever developed in.
Well written list of what made Go better language during last years. I'd add iterators, the recent big thing from Russ.
Iterators are very nice addition, even with typical Go fashion of quite ugly syntax.