Posted Feb 19, 2010 5:03 UTC (Fri) by aegl (subscriber, #37581)
Parent article: How old is our kernel?
There have only been about 169000 non-merge commits since git time began (the 180,000 figure quoted in the article includes all the merges).
All of the code in the current tree is attributed to just 131,681 commits by "git blame". So, not counting the merges, it would appear that about 23% of all commits are ultimately completely superceeded (or just plain reverted).