For a little more color on your modulo, the major omission in google3 I can recall from ~9 years ago was Android. For Reasons, I think legal.
The others weren’t “oh huh” enough to be easily recalled writing this comment, which probably speaks to their interestingness. But yes, you can chdir from search to calendar to borg and their dependencies, internal and vendored. It’s pretty much all there. It was pretty splendid, actually, and influences my thoughts on monos to this day.
