You can *physically* daisy chain them -- there is nothing that prevents you from doing that.
You can even get a "three prong" plug to fit into some (nothing made recently, IIRC) "two prong" extensions.
But, most extension cords are pretty cheap/flimsy. And, most "homeowners" see electricity as a *mechanical* phenomenon: "how do I get a continuous wire from point A to point B" never considering the bits and pieces they tack together to achieve that goal.
"Gee, why is this *wire* hot?"
I've got 100' of 12/3 stranded on a Hannay reel (nicely built product! But, very heavy -- maybe ~60 lbs) that I use whenever working in the yard, on the roof, etc.
By contrast, most homeowners will have some lightweight 14/16AWG cord strung across the yard. And, perhaps 15+A of holiday lights dangling off it!
Cords are also a trip hazard in a workplace. And, often result in "face up" outlets.
Here, the code requires outlets (receptacles) to be located at intervals not exceeding 12' (?) "along the baseboard". The thinking is that a user should be able to reach a nearby outlet with a ~6 ft corded appliance. WITHOUT needing an extension cord.
[On kitchen countertops, the distance shrinks to 4' between outlets as countertop appliances are intended to have very *short* cords]The cord (and the appliances/devices plugged into it) have ratings. In theory, a user could/WOULD ensure that the ratings of all devices were observed when using them. As well as knowing how to derate cascaded cords (plug ten 6ft cords together to make a 60 ft cord; is the resulting cord capable of handling the same load as any of the *single* cords used to create it?).
But, as I said, most users just see electrical connections as a simple matter of "how do I get the right number of the right
*type* of connectors where I need them?" ["Let's see... this cube tap gives me three outlets! So, if I plug it into the end of the cord, the single outlet becomes 3 outlets! But, I need 6. So, I'll plug this second cube tap in as well. But, that consumed one of those three outlets leaving me with just 5 instead of the 6 (2 x 3) I had hoped for! So, I'll add a *third* cube tap -- which also costs me an outlet giving me 7 instead of the 8 I thought I was going to get..."]Look at XMAS lights. They are designed to be cascaded for convenience. Plug the second strand into the end of the first. Indefinitely, right?? :> The strings that we use tolerate a maximum of three strings in a row -- the plug bodies of each are fused to enforce this restriction. Otherwise, you *know* someone would have "The Griswold's" (National Lampoon) house all fed from a *single* plug!
At last count, there were something like 57 "plugs" on various devices in my *tiny* office. (and that doesn't count the dozens of "peripherals" stored in the closet) I think, if I tried really hard, I *might* be able to find receptacles for each of them (there are six 6-receptacle FUSED outlet strips fastened to the undersides of the worktables -- no "face up" outlets allowed! -- plus at least two or three outlets on each of the 8 UPS's, also fused).
But, I don't *need* to have every device on at the same time (electric service couldn't support it if I did!) So, it's easier to just leave things unplugged (do I *really* need the four printers in that room "ready at a moment's notice"? What about the four scanners?) and bear the cost of manually plugging/unplugging as needed.
Granted, most folks don't have this much kit in their "home office" or bedroom. But, I'd wager most folks have *everything* plugged in at the same time! Even those items that seldom see use!
And, that many of these are NOT plugged into fused extensions or outlet strips. Rather, just whatever odds and ends (generic extension cords, cube taps, etc.) that they happened to have lying around -- to save them a trip to the store!