This is an age old debate. The real question would be, does the suspension "sag" as the cartridge wears. If it does you would raise the rear of the tonearm to correct it. I have never seen this happen in a measurable way. I have seen MC cartridges collapse because the tension wire let go and that is unmistakable.
This may be another case of lay instinct running away with itself. Complex mechanical devices like automobile engines do break in but cartridges do not even have any bearings just a rubber damper of some sort. In all probability cartridges do not break in they just wear out. There is a good argument that they sound best when new and without any stylus wear.
Sensory adaptation is an important physiologic process https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3501690/
A lot of what people think is "break in" is really sensory adaptation.
This may be another case of lay instinct running away with itself. Complex mechanical devices like automobile engines do break in but cartridges do not even have any bearings just a rubber damper of some sort. In all probability cartridges do not break in they just wear out. There is a good argument that they sound best when new and without any stylus wear.
Sensory adaptation is an important physiologic process https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3501690/
A lot of what people think is "break in" is really sensory adaptation.