Lets look at Andrew's main points:
I struggle to describe GPS units as anything more than “gadgets.”
A map and compass is more reliable:
No batteries
No electronics that can malfunction
No screen that can break or freeze up in cold temperatures
With a map and compass I can do everything that a GPS can do:
Pinpoint my location to a relevant degree of accuracy (maybe not within 3 meters, but I’ve never needed to know my route within three meters anyway), by paying attention to my pace and surrounding landmarks
Determine the distance and direction to my next destination
Mark my route, by writing on the map with a pen
Share my route virtually, by re-drawing it in TOPO! and/or Google Maps, or converting my TOPO! file to a .kml file (Google Maps) via GPSbabel freeware.
And, in fact, with a map and compass I can do even more:
Identify the path of least resistance to my next destination, unlike a GPS which can only tell me the distance and direction. Whereas a GPS might send me across a canyon or lake, into the thickest brush, and through a series of pointless ups-and-downs (PUDS), by reading the map I can avoid all of that.
Apart from the battery/breakage issues, I can't help wondering if Andrew has really tried to use GPS effectively. Perhaps his points have more merit on an unplanned walk where the path taken is decided on the fly, but there are several GPS these days with effective on the fly, on screen planning. His suggestion that a GPS is incapable of identifying the path of least resistance suggests that he may not have been using the right kind of mapping on his GPS either. Perhaps, for some of the places he goes the right kind of mapping is not available, but I would suggest that for most of us it is.
The battery/breakage issues require planning to minimise. In all my walking with GPS, I have never managed to break the GPS or to run out of batteries or to have the unit die on me. Counting back, I think I have had about 7 different GPS units since I started using them, not including smartphone apps which I regard as backups, not main GPS.
Andrew's best point is where he declares his preference for maps because "viewing an 11″x17″ map is much more pleasant than a 3″x4″ LCD screen, plus the expense and unreliability of said map packages."
I take maps anyway, so I have the benefit of using both technologies and the large map when required. I have found that using OSM mapping removes much of the issues with mapping reliability and expense in areas I walk.