No, not some internal company, just Microsoft being Microsoft. So all Windows pipelines. They also have Linux based pipelines so not completely all pipelines.
But given that a lot of people build dotnet stuff on Azure, the 'windows-latest' image is usually the default. So a lot of pipelines
That doesn't really work all the time, because large files or large commits are lazy loaded on scroll, so what you're searching might not have loaded yet
The code search does a server side search