Why does monitor not provide a reply message?

[hyperthunk]

I do realise this isn't covered by the semantics, but if we reply to the caller with DidUnmonitor, why on earth can't we do it for monitor too? The number of races I've hit up against by calling mRef <- monitor pid; doSomeWorkExpectingMonitorSignalsIfItFails pid mRef is astounding. And documenting this as not guaranteed is fine, but it's a nuisance not having it at all. I realise we can't guarantee anything other than we'll signal you once monitor returns, but still...