Should Lumix users buy the Olympus 75mm lens?

That's the long and the short of it. If you have super-steady hands you are likely to evaluate things differently than if you shake like mad. Or if you don't mind using a tripod.

I love my 75, but I've got the OMD's awesome stabilization to intercede on my behalf. I'm pretty steady these days, and with the OMD/75 I can handhold 1/20th of a second. I haven't tried lately, but I'm thinking I'd be about 1/100th on my best unstabilized day, and require the full 1/150th on a lesser day.

If the 75 had OIS, it would not be quite that effective. But you get the point-the stabilization can mean ISO 200 in place of 800, should you handhold without flash.