Developer infrastructure at google reported into cloud from 2013 to 2019, and we (i was there) tried to do exactly that: building products for gcp customers based on our experience with building interval developer tools. It was largely a disaster. The one product I was involved with (git hosting and code review) had to build an MVP product to attract entry level GCP customers, but also keep our service running for large existing internal customers, who were servicing billion+ users and continuously growing their load. When Thomas Kurian took over GCP, he put all the dev products on ice and moved the internal tooling group out of cloud.