It *really depends*. for me on typical "trails" a trailrunner is fine. (basically, and comfortable running shoe). for off trail work in heavy terrain I still wear boots, but good ones.

In all honesty, it depends *what your feet feel good in*. If you can walk in it all day, who cares what it is. People spend too much time in general analyzing footwear rather than trying it on and wearing it. Personally, if it feels good on my feet and I can walk in it I don't give a darn if the accepted wisdom is completely different.