At Microsoft they have this great expression that has passed into common language – it’s called “eating your own dog food”.
It implies that you must consume the products that you create. As Microsoft was the epitome of the software world and changed the way people developed code, this made sense.
While the company may look a little dated and as less able to remain relevant than, say, 15 years ago when I was there, it still cuts a swathe in the world. And rightly so.