I knew a guy who had an old 1970s Subaru that was like that (i.e. Swiss cheese floorboard).
You haven’t lived until you have owned and driven a “Guam Bomb”.
During Vietnam a lot of SAC B-52 crews were based on Guam and flew missions all over SEA. To get around on the island they bought cars through the Exchange. At first no problems with anything then the island weather and humidity took over. Floors, powered windows, trunks were along the first to go. Then various electrical accessories including lights went bad.
Drove one in early 1973. When I came through again two years later it was still there, more or less. When I left in late 1975 I left the keys on the front seat, where I found them, for the next user. It got me where I wanted to go fairly often.