In my opinion the "store everything" approach is actually a good thing. By not caring about which pictures look best I can immerse myself in the moment more instead of caring about storage. Many times when I reviewed pictures I took in the past, shots I thought were terrible actually captured details that the "good" shots didn't. You'll have more clarity when leisurely reviewing pictures on a computer.

I agree that storing pictures on someone else's service is not a good idea in the long run. The recent AI hype wave affected RAM, SSD and HDD prices. I think grabbing large SD cards now before they are affected too would be a good move.