Accuracy degradation: chrome vs. chrome moly

Been looking at the Criterion 22" medium weights in chrome vs. non-chrome. As I understand, both are solid barrels. Modern chrome barrels seem to be more accurate and better machined than USGI barrels.

Much has been said about chrome vs. nonchrome, but I'm curious about how accuracy wears out over time in both.

As I understand, chrome moly is more linear degredation (sub-MOA for first 4K, 1MOA until 5K, 2 MOA until 10K etc). For chrome lining, however, is that wear still linear? Or does it maintain the same accuracy from 0 to 14999 rounds, the chrome flakes on the 15000th round, and then it goes totally downhill?