unless your feet are trained and you have practiced for all types of terrain … i think its a bit of a myth that anyone can just put on sneakers and get through any environment and conditions
up here we have quite a bit harsh terrain if yr off the beaten track … wet slippery rocks, moss all over the place on said rocks, what is basically a rain forrest, etc … and snow in places …
i can easily see some runners not having the needed traction for some of the conditions we may get … especially in a rain storm, which weve had quite a bit lately …
also remember that in cold wet environments, trench foot is a VERY real concern … your feet need to be kept at least dry or warm even over a single night in cold wet conditions …
heres someone 2 years ago who couldnt get out and needed to be rescued because of trench foot that developed overnight
http://news.nationalpost.com/2011/10/23/man-lost-for-nine-days-in-b-c-s-north-shore-mountains-cheated-death/
remember that with well ventilated runners, your feet WILL get cold and wet in an overnight bivy, and you need to protect them in an emergency or you may not be able to walk out
i think its pretty telling that NSR has to keep footwear in its supply caches for rescue to give to people …
runners work great, when you know what you are doing, are well trained with them, and are aware of their limitations
i think its a fallacy though that they are suitable for everything and anyone, who may have minimal experience and training with them in harsh terrains and conditions …
;)