Good to know about the lens roadmap and battery life. I have a second battery for my D50 for much the same reason, though life is pretty good and seldom runs out on me mid-usage.
The Z50 with the two kit lenses looks like it could replace my D50 + 18-70mm + 70-300mm; the new 50-250mm lens has a shorter reach but shouldn't be a big issue on a crop sensor, and would be lighter than the 70-300mm. Using the adaptor to allow use of the wide and micro lens may tide me over until Z equivalents are available. Reading reviews and watching for a good sale is where I'm at now.
The Z50 with the two kit lenses looks like it could replace my D50 + 18-70mm + 70-300mm; the new 50-250mm lens has a shorter reach but shouldn't be a big issue on a crop sensor, and would be lighter than the 70-300mm. Using the adaptor to allow use of the wide and micro lens may tide me over until Z equivalents are available. Reading reviews and watching for a good sale is where I'm at now.