Should exhaustiveness testing be on by default?

[Don Stewart]

I'm not sure I'd want -Wall on by default (though being -Wall clean is
very good). But exhaustive pattern checking might well help out a lot of
people coming from untyped backgrounds.
 
    http://ocaml.janestreet.com/?q=node/64

Ron's also wondering why exhaustive pattern checking isn't on ?

Anyone know why it isn't the default?

-- Don