Hey I resemble that remark!
Ok, seriously, as a section hiker I have done with and without the maps. Having covered a significant portion of the trail, I'll echo Moldy's comments about the ATC maps. The formats do change, some are one sided (why, oh why?), some are double sided, some cover large areas others cover so little that if you are lost it's almost impossible to orient yourself with a compass and the topo. Also, once you hit your stride and start pulling down larger miles you'll find yourself using a map for two or three days, then having to reach for another, then another and so on. Perhaps the most frustrating part, though, is that the elevation profile and map data can and (in my experience) have been very out of date rendering any planning for the day moot as the distance between shelters was longer/shorter/harder/easier. Trust the Companion or Guide for mileage distances and elevations, not the maps!
I always recommend having a map for safety but if you have the Companion or Guide you may find the maps more trouble than their worth. On my last big section (175 miles) I forgot the maps but had the Guide and Companion and didn't miss the maps. The elevation profile in the Guide is quite handy. That said, if, like others, you wind up in an emergency and need to get off trail, you'll be hard pressed without GPS or maps on a phone to find the shortest way to safety or help.