@rysiek @Antanicus gaia think of the waste all those charger variations must have produced, actually no scratch that I know how much waste it produces because my family stories everything and it normally falls on me to explain that "no these charges will be useful for absolutely nothing in the future, they where manufactured to be replaced almost immediately".
I keep some as well. I have a small collection of various voltage transformers. And I use them when I need some particular voltage and I find a match (must match max current as well). Connectors can be replaced ; sometimes I just directly connect wires.