Well, it still works.
My wife and I just got done pulling 11ft of 14/3+ground through the old BX sheath from the attic to our bathroom, using the 2 old rubber/cotton insulated wires as a pull. Total time, less than an hour.
This was with one 90 degree bend up in the attic -- it runs along the floor, disappears under the attic floorboards, and goes down the wall to the switch.
Again, I wouldn't expect it to be as easy with a second turn, but I certainly would at least try before pulling out the sawzall and sledge !
You can donate to your local food pantry instead of sending the donuts.