Replace Java with Go (not much of a change, all things considered!) and that's exactly what Google seems to be doing. It's a big problem for them in the long run because it does mean accruing a mass of technical debt that will not necessarily be easy to get rid of. You'd expect "smart" folks in a tech-oriented enterprise to do better than that, especially if they're unutilized otherwise, but it can't be easy to do that sort of management at Google scale.
Replace Java with Go (not much of a change, all things considered!) and that's exactly what Google seems to be doing. It's a big problem for them in the long run because it does mean accruing a mass of technical debt that will not necessarily be easy to get rid of. You'd expect "smart" folks in a tech-oriented enterprise to do better than that, especially if they're unutilized otherwise, but it can't be easy to do that sort of management at Google scale.