So I made my decision that the Z50 is staying.
It isn't a perfect camera.
It is simply a compromise of things.
I found my biggest issue with the D3 was weight.
It was the difference between carrying it and leaving it behind.
I looked seriously at the Z6.
But it came down to weight again.
Better picture quality? Yup, the Z6 wins hands down.
But heavier body, and that leads to heavier lenses.
I'd still be carrying my good glass.
So in the end, the lenses were the obstacle.
Not just the cost, but the size and weight.
The kit lenses in the Z50 can do what I wanted them to do.
And darn, they are light.
Z50, 50-250 kit lens hand held pointed at the moon.
That will be just fine for what I wanted.