(this thread establishes 10,000-20,000 rounds on average)
Again, where are you getting that?
This thread does no such thing.
One poster says 10k-20k, another says 20k+, another 25k-35k, several say 30k+, and one even claims 100k+.
How you get that to work out to an "average" of 10k-20k is puzzling.