These are good results.
I wouldn't mind a fp as a second camera, I've no doubt it's capable of great images.
I think all of the pics I've been posting in the
legacy lens thread have been with the fp.
It works really well as a platform for manual lenses, in a way that harmonizes with some of its limitations. If you're shooting with legacy manual lenses, you're typically not going for action shots, which avoids the rolling shutter issue; I've never seen it in any of my pics. (What I
have seen is rare rainbow banding when shooting the output from a digital DLP projector; this caused some problems at a local museum that made heavy use of projectors.)
Manual lenses also fit very well with the minimalist control system on the fp. Aperture control on the lens, assign shutter speed (or EV shift) to the control dial, focus magnification to the AEL button, focus peak toggle to the video record button, and that's all the interface I need 99% of the time; it works really well for me.
When I wanted to experiment with full frame, I rented all of the cameras I was interested in. The Nikon Z5 I didn't get along with at all, and while I liked the Lumix S5, it didn't really grab my attention (although I did buy one later during one of the regular sales). The fp did grab my attention. I have a thing for small cameras, with the Lumix GM5 and Olympus Pen-F as old favorites of mine, and the fp follows well in that tradition.
Sadly, the clip-on EVF spoils the clean lines of the base camera; I agree with the poster upthread who wants to see Sigma add a Pen-F style EVF. But even with the added awkwardness, the fp+EVF is still smaller than other FF cameras, and not by a small margin. Pair it with a pancake prime like the Pentax-M 40/2.8, OM Zuiko 24/2.8, or one of the M-mount Voightlanders, and it slides easily into the top layer of a small bag, with another 3 primes or small zooms fitting into the lower layer (right now I have the Super-Takumar 50/1.4, OM Zuiko 35/2, and Minolta MD 35-70/3.5 Macro).