I would absolutely use it and as above, it would be my first choice, clean sheet.
The ZR/Nikon probably doesn't quite have the AF of Sony and it might not quite have the IBIS of LUMIX, but we are really beginning to split hairs these days when it comes to spec and performance.
It's compact, has possibly THE best lens selection (IMO, there is no 'possibly' about it, - it just does including near native adaptation of Sony E glass via Megadap) and it's e Shutter only approach on the ZR and Z8 would not be an issue for me as it is with LUMIX where in certain lighting conditions, it's shit (for stills).
Give me a pair of ZR's, a single Z8 and 3 lenses of my choice, 1x monopod and 1x tripod and weddings/events would be a breeze.
No better than my current LUMIX set up, just a sideways one and one I would not hesitate to use.
I could make the same argument for Sony and Canon. It just comes down to personal choice.