Your particular individual experience is not representative of the overall reach that Microsoft has, which is what OP is pointing out.

GitHub is the defacto "point" of software these days, with most devs jumping to that before anything else.

VSCode is the highest ranked editor from the StackOverflow 2023 survey, with (IIRC) something akin to 70%.

Azure is the icing on the cake, because now you have an entire generation of developers building on GitHub, from VSCode, and deploying onto Microsoft infrastructure.