rain.. If you leave a laptop near a window, there is a hazard rate of rain damage

The list changes over the years, because some factors lose significance with new technology (examples not necessary, but look at SSD), or my usage changes.

Q: given a laptop with a remaining lifetime of 3Y, what aging [wear-n-tear, hazards,,] factors are the most important to mitigate?

1. bangs [impacts] … like impact on backpack, hard landing on table, accidental fall-off from backpack,,, On-the-go laptops tend to experience a worse hazard rate.
2. component::keyboard .. physical wear-n-tear, but relatively easy to repair
3. oxidation .. (rusting) New laptops are always wrapped in plastic to block out moisture. My experience shows me the effect of disuse.
4. component::hinge .. physical wear-n-tear
5. component::battery .. yes wear-n-tear, but easy to replace