Curious why it is so hard to find an owner to the issue. Gates' experience started with the web UI, then I'd expect that the team who owns the microsoft.com or owns the experience. To them there are only two types of bottlenecks: their web pages (usability, JavaScript performance, ways to get backend data, and etc), and their immediate dependencies. So, they drive improvement on both types of the bottlenecks, and the owners of the immediate dependencies recursively handle their own. For instance, the web team will identify that calling the catalog API has a P99 latency of 5 seconds and the network is fine, then they ask the catalog API to improve the API latency. If the catalog team does not do the obvious, the team's manager gets punished.

Of course, I'm being naive here, as I've seen too many companies fail to achieve such basic ownership. So, curious what I have missed. Of if the ownership is not a clean DAG, well, it goes back to Gates, as he was responsible for both the org charts and the company culture.