I think you meant to say "when my paper is rejected, I can trivially change the format of references to whatever the publisher of my second choice journal wants without any effort" ;-)
Ha! Actually, I use this so that while I write my papers, I can use a format where I can see the first author's name and the publication year (which is meaningful when I glance at it). Then, when I submit, I can quickly put it into the format that the publisher wants, which seems to generally be numeric (and meaningless). But, hey, I won't complain about anything that lessens the pain of rejection :)