Exactly this. People at MSFT don't know how Outlook works down at the gears and levers. One person still there called someone who took a buyout to ask questions and was told "ask copilot." Which I is a level of spite I aspire to.
anyway, the huge and bizarrely *long* outages big tech companies keep having are almost certainly less about AI & more about all these companies having either laid off or driven out a whole layer of their engineering orgs that had been there for decades & had deep understandings of their prod stack