But that’s not my argument at all. I’m saying that quality is impossible to measure if 0 people use it. Once you go above 0, it can be measured and it’s not necessarily related to how many people use it.
If I were to write 2 simple functions that reverse an array, and one successfully reverses an array and the other just randomizes it - despite never using this function, we could all agree that function 1 is of higher quality than function 2.
This is an extreme example but the same can be done for, lets say, speed or error handling.
If that code never goes into production with real customer use-cases, everything we say about its quality (on any metric) is 100% theoretical! We can try to replicate that environment, and we should, but until it's actually used, we can't truly know.