That is truly ridiculous. A whole notification daemon, running all the time and reporting on the completion of cheap operations as well as expensive ones, to cover something that could be equally handled by *ringing a bell* when the expensive operation completes?! Talk about utterly pointless bloat.
(Not that git or hg bother to ring bells when expensive operations complete, because even massive tree clones in both of these tools take a fraction of the time they take in bzr.)