This is a problem we all face to one degree or another. I generally tend to stockpile items that ar versatile and broadly useful.

You mention flashlights. I have no regrets investing in improved technology. I am very happy with my current flashlight/headlamp assortment, many ties more useful than the POS headlamp (incandescent bulb, carbon/zinc batteries), dim and unreliable, that I used to fight wildfires years ago.