> same user validation in 2 places, changing it in 1 place may lead to issues, which are difficult to discover. Disagree. Quicker discovering issues difficult

> same user validation in 2 places, changing it in 1 place may lead to issues, which are difficult to discover. Disagree. Quicker discovering issues difficult to discover is actually a good thing. > Its more difficult to build context of the implementation, if one needs to jump from file to file. Agree. In general, I personally look at DRY as "It takes time to implement and/or understand it, but when it's done then it works and it will last." "It takes time" is something your boss won't like, but that's (mostly) not an issue if working on open source SW. No boss -> no pressure -> higher quality.