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I moved from Sony to Lumix about 6 years ago. Much of my motivation back then was video, where Lumix leads the pack. But over time I came to appreciate how good these cameras are for photography. I currently have the S1RM2, which I consider the best all-around camera out there. (I do still have one aps-c Sony, an a6700, that I use as a very small camera when I don't want to pack larger gear.) Early on, Lumix lens selection was very limited, but it has grown so much with the L-mount Alliance it is not a factor anymore - now it's deciding what to get from everything available.
The menus are pretty straight forward, but they do take some time to learn. I put them more or less on par with the current Sony menus, just a different format. And the Q menus are great once you get organized. This forum can answer questions as they come up, and can have more than enough recommendations for lenses.
I am a photographer rather than a videographer and find the S1Rii is the best camera I’ve ever used. The sensor really is excellent, giving great resolution and decent noise performance. I also think the feature set is excellent for stills. As Charles says, the lens range is now really extensive with something for everyone.
I dabbled with Sony Alpha (A7Rii) but in comparison, the S1Rii is better in all respects. I really have no complaints (well, better battery life would be appreciated!).