[slighly offtopic] use notmuch as the sole msg store?

Howdy! Happy mutt-kz user here. I'm wondering whether any of you thought on going further and using notmuch/xapian as the sole store for mail. Why am I asking this? Mutt does a bazillion file operations which is insanely slow under OSX; I'm wondering whether could we plug libetpan and feed mail directly to the database, sync the changes back. This would mean we would have all the mutt-kz awesomeness without having to muck with mbsync/offlineimap and having to use double storage space (Maildir + notmuch db). I'm not asking for anyone to do it, more interested in hearing if this is crazy talk and I'm insane of wanting this :) Thoughts? -- qmx