I have a TG and have no interest in carrying that around. I was hoping for a weather proof small zoom; not changing platforms completely. Thank you for the suggestion. If I did switch platforms, it would be to something completely different. Weather sealing is just a want, not a need at this point. I have plenty of sealed lenses but none that pair well with the OM-3. I purchased an OM-3 + 12-45mm f4, which is arriving today. I'll consider trying the 12-45mm but was planning on selling it.
I think OM System has a super-mature line of lenses that are almost all stellar. It's rare I don't like a lens. We're really lucky. I do think all other systems have largely caught up. If OM System doesn't have the capacity in capital or talent to create new lenses, then the next best thing is perfecting existing designs by adding features such as IS and weather sealing. The last, worst thing is adapting full frame lenses, which is sadly what I think they're doing. Huge mistake IMO.
Again, I appreciate the recommendations but I was hoping there was an old or maybe a 3rd party sealed small zoom. If the 12-40mm can be sealed, so can a pancake. I think the problem is that m43 users are likely not going to pay a premium for a pancake zoom with small aperture.
Thanks