"And as always I agree with you when you say there is no reason to have discussions of personal experiences as our tastes vary greatly."
There is reason to have that, but no reason to put too much trust into any single case that any of us might report, though some will be more trusted than others.
WHen many say the same thing, then clear patterns emerge that people can bank on with more confidence.
Also, fringe issues are just that fringe. WOrth some discussion, but not nearly as much as things that are widely accepted core principles and tenets of good sound, which one can read about in many places.
We all think we hear what we hear and know what we know, but that alone does not make it true.
I suspect cartridges do tend to "warm up" in general, for better or for worse, so that is worth knowing. Take action accordingly if this is a concern. That's about the extent of it from my perspective.
Just mine though.....