Hmm, doesn't Rob Pike now work at Google, which has developed the Chrome browser, which in addition to being a successor to Netscape (mentioned in the article) is basically a complete OS and runtime environment, as well as the literal ChromeOS, Android, Fuchsia, and Kubernetes, as well as Dart, and Go (and also adopted Kotlin for Android?) Not to mention software systems for special-purpose hardware like tensorflow, quantum, etc..

Which of those are research projects and which are commercial products/projects (or both perhaps?) is left as an exercise for the reader.