In this thread, I have thrice offered what I consider to be an obvious truism: when shooting telephoto or macro in low light, some form of stabilization is advantageous. I believe this is particularly true for wildlife and sports photographers for whom a tripod is a clumsy and ineffective solution. The other solution, of course, is to accept a higher ISO or less favorable shutter and/or diaphragm settings.
My appreciation to all who have responded to this thread in a spirit of relevant discourse and information sharing.
I don't see the absence of IBIS in Z50 being an issue affecting my decision in buying the Z50. The strength of the Z50 is in its portability, hybrid AF, excellent IQ, hot shoe and touch screen, all in a very competitive price package. It is also compatible with all my Nikon lenses.
To me, with the 16-50, the Z50 is about a pocketable APSC with a standard zoom range. Together with the 50-250, the entire package is excellent for light weight travel and for a good range of shooting conditions, including wild life and sports. Both the 16-50 and 50-250 have excellent VR to 4.5 and 5 stops.
My current camera that I carried around all the time is a Coolpix A, the first Nikon APSC mirrorless, which does not any form of VR. I have thousands of excellent images and videos from the CPA, under all kinds of lighting conditions. I just can't see why IBIS, even VR is such a big deal at all, especially for a small pocketable camera. I still consider my CPA the best camera that I ever have.
Yes, those full frame Z lenses can also be used on the Z50. Those lenses doesn't have VR. But the use of those on the Z50 will be my conscious choice, if I ever would do that. They are also big and bulky, defeating the purpose of getting a light weight package.
And also why would I do that, when so many excellent and cheaper F mounted lenses can be used with the FTZ for some of the special and challenging shooting conditions. I would need to accept the extra bulk, one way or another. Then again, how often would I do that. If I do, I probably have the wrong tool for the job anyway.