I used to be able to get away with this by downloading music, podcasts and maps at home.

During the iOS 26 upgrade cycle, iOS deleted all my third-party map apps and then expired the locally downloaded apple maps. My phone also somehow lost my downloaded podcasts + music a few times, but, unlike losing three offline map applications, that didn't strand me in the middle of the woods with no cell coverage and no maps.

I agree that 4GB (or even 1GB) goes very far with a working phone OS though.