Fair enough! Though they're quite clearly a much more serious/focused/resourced team than the goja dev, and they've fully integrated it into the K6 codebase now. I expect it'll have a bright future.

Since you're doing ETL, did you consider something like Conduit, which is written in Golang and also allows for JS processing in the pipeline? Or is that overkill for what youre doing?

https://conduit.io/docs/processors/builtin/custom.javascript