Unless you use FX glass as I intend to, in which case you more than double your resolution.The Z50 and Z7 have the same pixel pitch and equivalent resolution so I don't see a gain there.
Day to day, the only menu option I use is format card. Everything else is on a physical control or the I menu.If you are now familiar with the Z50ii menu structure you will often be looking for settings that don't exist on the Z7. Expeed 7 makes a HUGE difference in available options.
Likewise, I’ll take EN EL 15s and CFe cards which I already have for my Z8.I don't need to take two types of spare batteries and memory cards. EN-EL25 and SD are all I need and the Z50ii can charge the batteries internally.
I don’t see the complications you do but maybe I’m overlooking something.It appears to me that you will be buying an obsolete camera and adding complications to your trip.


