Ha ha. I've got quite enough ultrawide lenses already
The one thing I thought that was missing in m4/3 was a fastish rectilinear ultrawide prime. So the first lens I bought was the Lumix 14mm f2.5 and I got hold of the Panasonic 3 lens converter set -fisheye, ultrawide and macro. Shot that for a year or so, while contemplating third party options. The Kowa was a bit big, as was the Voightlander. Panasonic released the excellent PL 8-18, so I kind of reluctantly bought that. Basically to use at the wide end, and not any heavier than the two lenses mentioned. Fabulous lens, love it, but still had the tiny, light prime itch.
Laowa released the 10mm f2, had to have it, I'd given up on Panny and Oly ever releasing one. Bought it online at release, another brilliant lens.
Then Panasonic released the 9mm f1.7 out of the blue, at an unexpected very reasonable price, had to have that too. Main attraction being autofocus. Another brilliant little lens. It's made the system complete, in my opinion, a fabulous tiny light option for prime lovers such as myself.
In between, someone gave me the idea of trying the wide angle adaptor/converter lens on my Lumix 12-32. It works surprisingly well, I think better than on the 14mm pancake. So I really don't have any interest in another wider angle lens, especially a zoom, as the whole reason I dived into m4/3 was the selection of tiny light prime lenses available. I'm sure the 12-45 is a fine lens, but f4, and starting at 12mm just doesn't do it for me. My Lumix 12-32 sort of just sits in my camera bag, as a "just in case" option, which is a little bit shameful, as it's really much better than that, and fits my tiny, light and relatively inexpensive criteria