But, they are working toward Go2. Generics, which are the biggest talking point whenever Go is discussed, is already added in a branch and is supposed to come in a year or so. It'll be interesting to see how it'll affect the trends data after that.
Do they actually have people who are experienced with type theory working on the type system, or is it the same core team?
Philip Wadler ? https://arxiv.org/abs/2005.11710
https://trends.google.com/trends/explore?date=all&q=%2Fm%2F0...
That doesn't mean it will ever achieve popularity, and could also go away.
However, with the Go developers' insistence on changing the language as little as possible (not good or bad, it just is), it seems unlikely that Go will see a resurgence that brings it to multiple times usage than it has now.