IMHO 10 feet of cordage would likely not be enough to perform many of the uses for cordage, especially shelter construction. However, if that amount is what is in the pocket at the moment of need, that's what gets used.
I typically have about 50 feet or so of 550 paracord in various pockets and may have 100 feet or more of small cord also available. Dental floss can be incredibly compact. Braided fishing line and mason's line are less so, but they are stonger. If I have my hydropack "carry about" with me, there's another 100 feet or more of paracord in there, along with first aid, shelter, firestarting tools, etc.
FWIW, I live in a suburban area so the likelihood of actually *needing* this stuff is small. But I find the inconvenience of carrying stuff I may not need smaller than the guilt of not being able to render aid because I was too short-sighted to bring a few multi-use items with me.
JMHO, -- Greg --