Compare that with exploring different paradigms and priorities (such as Postgres and Mysql who happen to have very different philosophies), which is absolutely OK in my book. Nobody wants a monoculture. Except malicious bystanders who first and foremost like to make this into some kind of faction warfare.
I don't really have a stake in this fake database conflict, but why is it that Postgres always seems to attract these kinds of people whereas Mysql users seem to be content doing their thing mostly in silence and without the vitriole?
