:drake_dislike: switching to "main" for the sake of political correctness and "sending a clear message"
:drake_dislike: insisting on "master" out of spite to the political correctness and language policing
:drake_like: adopting "trunk" from SVN to avoid arguing with both camps, honor an innovative¹ VCS of the time, and have consistent terminology (branches in a real tree grow from the trunk)

¹ then most s/w projects used CVS and file locking, while SVN offered merging and generally much saner interface resembling Git, e.g.