I've always been careful with my magsafe chargers, and I'm a former recording studio engineer so I'm not a newbie about cables and strain relief. However, usin

I've always been careful with my magsafe chargers, and I'm a former recording studio engineer so I'm not a newbie about cables and strain relief. However, using my laptop on my lap provided too much exercise. The insulation on every magsafe I've ever owned has failed eventually. These things were spec'd to go on table tops and then never move. It's a crying shame because otherwise magsafe was a really elegant design.