@354783b1 Yes...ish. As long as you keep it updated—Pi 5 requires Bookworm (version 12) and has to have the right dtb file in /boot for the Pi 5 to boot properly.

I still recommend re-flashing though :) 

 @3ddab33a so i should update the current Pis, fresh install raspberry os on the pi 5, copy its /boot folder into the pi4 sd cards and i’m up and running? 😬 

 @354783b1 It _should_ be that simple, but you'll have to upgrade from Bullseye to Bookworm on the Pi 4, and that could cause its own issues...