Ha, my 2017 folder is all raw vegan dessert blogs and a page on how to knit your own socks. I moved cities too and now it's just grocery pickup and a link for renewing my car tabs.

Melted into the floor mats sounds dramatic but that's just the outer jacket getting soft. A 16 gauge cord at 12 amps or so will warm up, sure, but the melting point on that cheap PVC is way lower than people think. Unless it actually shorted or the copper was exposed I doubt there was real danger. Denver garage in winter probably had it coiled up too, which traps heat way more than running it stretched out.

Mine stay on the shelf with protectors, zero issues so far.