No inside information, but presumably this means Delivery to other organizations, which, among other things, includes maintaining outbound IP reputation, which is closely related to Spam and Abuse.
A long, long time ago I also implemented tic-tac-toe in HTML. But just as a set of HTML pages with links for each X move (and an implied O move by the "computer" player). Total size of all the pages combined is about 60 kilobytes.
As an owner of both a manual transmission car and an EV, I enjoy driving them both, but I don’t want the manual transmission experience with an EV power train.
What I meant was that I thought any system that required some form of distributed locking or consensus, did so by building on top of Chubby (which does Paxos), not by implementing Paxos directly.
The Paxos, paxosdb, and related libraries (despite the name, all are multi-paxos) are solid and integrated directly into a number of products (Borg, Chubby, CFS, Spanner, etc.).
Maybe things have changed, but I thought the bottom turtle for pretty much any infrastructure system at Google was Chubby. I didn't realize Borg now directly does Paxos.