I can't find the document but Apple's official instructions for their chargers include winding around the pop-up plastic legs. I've never had a frayed cord since the days of the TiBook, but I have managed to break a leg on the adapter and crunch the connector when the laptop fell while connected. MagSafe, while a little pricier, has been more cost-effective for users compared to the truly unacceptable design that existed before.
Apple got rid of both MagSafe and those pop up winding legs on the new MBP.
Yeah, interesting - that's certainly not and never has been my use case (ultra / daily portable), there must be some sort of rating for number of insertions / connections similar to the varying USB standards over the years - I wonder if that's published somewhere, if so we could probably do the math and come up with a - moves per week rating for a charger?
I have never had an entire Apple charger stop working, though.