Just one more datapoint. I had an older MacBook with the T-Magsafe and I now have a MacBook Pro with the L-Magsafe. I love the L-Magsafe. With the T type the cable near the connector would fray every year and a half or so. I had it replaced once for free. The second time I had to buy a replacement. Never had a problem with the L type. For me the return to the T type is a regression but I read in this thread that people had fraying problems with the L type. Is it a huge technical challenge to make a laptop charger that will withstand normal wear and tear for at least 3 years?