I think there is a subtle 'gotcha' waiting to trap the unwary. You fly around your regular routes and airfields and have a feeling for what's underneath you. Often, especially in B777, you will be at a major radar airfield. Thus you fly the magenta line & radar vectors and do not have an en-route chart or TMA chart to hand. You've briefed via the STAR chart, but now you debate off the STAR and are lost. It's a consequence of LNAV/MAP displays; and even more with paperless cockpits. OK the charts on on i-pads, but only of you lookout them. Complacency is going to be a killer, and trusting technology to save you is not a healthy attitude. Remember Air Inter at Strasbourg with the EGPWS disconnected. It would have save them, but the company had disconnected it.