For me, the worst is this: "As for Go itself, there is no tracking per se but the go command does by default connect to a Google-run module proxy and checksum

For me, the worst is this: "As for Go itself, there is no tracking per se but the go command does by default connect to a Google-run module proxy and checksum database, as is noted on the home page below the download button as well as at the top of https://go.dev/dl/ https://go.dev/dl/. That page in turn links to https://proxy.golang.org/privacy https://proxy.golang.org/privacy, which explains exactly what information is and is not collected, and for how long"