To each his own. If you were to travel in the States or Canada , you can go vast distances with no cell coverage, having lots of caches in your gpsr means you can do more without having to load your gpsr all the time and you won't be looking for wifi or cell service to update with another gpx file. I have gone on trips where I didn't have to load any files , just cache, to me having a GGZ export on PGC just makes sense, It's not for everybody that's why the gpx export choice will still be there.