When I refed most of the receptacles in my 1967 house (copper, no less - but no grounds) I never got around to stapling the romex to the bottom of the crawl space located floor joists. One of these days when I feel like crawling under the house. Not much head room, less than 3'. Could barely replace the old oil furnace when it died. Don't look in the attic.
I did refeed the original 100A 100% unprotected panel in a closet. Fed straight from the meter pan! Now have a NEMA 3R, 6 ckt panel beside the meter. That took some doing. Only a few circuits left. One day I will move the rest out and remove the panel. When we moved in the house had the one panel in the closet, we now have it plus three others and the 6 ckt panel at the meter. Oh, and one in the barn.
It's a lot better than the original stuff.
RC