Whilst working for TfL I've spent many hours (a day) riding all over the tube network, in recent years I rarely see people looking at the paper tube map, what they do use are the line maps inside the cars and the platform/ticket hall maps. Most of the time people are looking at their devices. I now use the pdf map on my phone, it's easy to enlarge, I rarely bother with journey planners. I used to get asked for directions, mainly by tourists, quite a lot but this has dropped off dramatically, I think people would rather get the information from their devices than talk to a live person!