I don't blame OP for leaving. You can usually get the vibe in 3 months and have a pretty good feel for what things are in your control and how it's going to sha

I don't blame OP for leaving. You can usually get the vibe in 3 months and have a pretty good feel for what things are in your control and how it's going to shake out. I left HashiCorp in 4 months for basically the same reason, just swap our frontend with Go. I was interviewed in Go and I knew the team was using Ruby but all the teammates were energetic for having someone else who knew Go, wasn't all about Ruby/Rails and the team was great. But the opportunities on other teams to build out things in Go and work on the existing Go codebases, both public and private, was just teasing me every day. I tried to work on one of our open source libraries and was told I was stepping on someone else's toes and could be taking opportunities away from them. I would return in a heartbeat on one of the Go teams working on one of the Go products. I think they are just great in the Go community and their tools are fantastic.