i don’t mean to be argumentative but i haven’t seen many pennies become corroded. also copper pipes in houses I’ve worked on have held up really well. I’m pretty sure a copper water line is more likely to oxidize via galvanic corrosion instead of moisture.
buttons on a controller seem to be at much lower risk of corrosion with respect to pennies, water lines, etc.
right before the used car market exploded i got my manual Subaru for $3400 when it was worth about 10-12k because of a misfire. yeah it just had the wrong spark plugs in it :p and it’s about as dumb as they come. it has a radio, abs, and cruise control - no other driving assists or telemetry