Microsoft built a whole another company called Azure. Smartly acquired 2 other companies called LinkedIn and Github. Then invested early in the biggest phenomenon of the post covid world - Openai.
Google ended the 2000s with Ads, Search, Youtube and Android. It's 2023 and not much has changed. Facebook sustains it's growth entirely through multi-billion$ acquisitions.
In all cases, the original middle management did very little to help.
Azure is the only exception.
Office 365 + Sharepoint is a major, major business.
The number of employees that need Office 365 accounts is always going to be more than the number that need a Figma, Salesforce or chatGPT account.
All you've pointed out is Wall Street's demand for eternal growth is untenable, as if we didn't already know that.
They do already have several "train your own model"-style ChatGPT products available though.
0: https://www.extremetech.com/deals/307468-microsoft-azure-is-...