I don't think myth will ever produce a cult following, the product has to be really good. And, the OM's are really good.
I have 2 of them, and a Canon AE-1, and a Konica Autoreflex and 2 Pentaxes, and the OM's do 90% of the shooting. The lenses are compact, high quality and almost all use the same filter size. I can carry 2 bodies and 2 lenses all day and not get shoulder sag.
Olympus just plain got it right.