Coupled with this (unsubstantiated but thorough) discussion on the internals of Azure, if even a fraction of this below-linked post is true, Github's abnormally-filesystem-intensive workflows would have wildly unpredictable performance and reliability forced onto Azure.

https://isolveproblems.substack.com/p/how-microsoft-vaporize... https://news.ycombinator.com/item?id=47616242