I don't understand riding clipped in for much of anything beyond fairly smooth XC. On my road bike, sure, but I'd bet there's always at least one time per MTB ride that I'd be panicked, and quite possible eating **** due to being clipped if I used them for MTBing. Also, once in a while I like to try a section/obstacle multiple times, so I'll do the section and then hop off and go back to try it again. That would be kind of annoying have to clip and unclip constantly rather than just hoping on and riding without even thinking about it.