OpenOffice.org went through contortions as it changed version control systems over the years. It got to the stage where devs would comment out code rather than deleting it because they didn't trust the VCS.

LibreOffice put the code into git and went mad with an axe deleting all the commented-out code.

Apache OpenOffice, on the other hand, still commits new commented-out code. http://mail-archives.apache.org/mod_mbox/openoffice-commits/... Possibly nostalgia for the good old days at StarDivision.