Frameworks for one always work, always do exactly what you want them to.
They are the most intuitive systems on the planet that can never fail no matter the bug or the error.
But what happens when it becomes a Framework of Two? Or Three?
What is the cost to move to more than one user consuming your framework?
Could be what you have built isn’t a framework, but rather a collection, still a great starting point to build something.
The best metric of any framework will always be – how long does it take for someone to be productive with it? The best frameworks allow people to onboard quickly and contribute mass value to the end result, those are the frameworks you want to build.