What world are you living in where the median piece of software has a million users? Or even a hundredth of that?
Unfortunately the number of users and the collective value of their wasted time doesn’t make arguing for efficiency and performance any easier.
I once noticed my name in the Chromium OS credits due to a patch I had submitted to a library that's on every Chromebook. 1 million would be a small number for Chromebooks alone.
The ones that stick out are actively maintained, widely used, and well funded. It doesn't have to be a million active users, but they should be the first to get their act together.