I've been riding mtb for around 20+ years (first bike was a 1983 Skyway Sherpa Scout cro-mo full rigid; suspension was not even a day-dream yet ; ) Nobody 'clipped-in' in those days with the exception of toe straps/cages.
For the first 15+ years I rode bear-traps, then switched to SPD'd but quickly migrated to Time Atac Z's. I like the incremental power of being clipped in but don't like to be clipped in on sketchy, 'ejection seat handle at the ready' terrain and I don't like to be wearing my cleated shoes when I want to hike around a bit, even though the shoes are more of an athletic/hiking shoe than a pure bike shoe. Still, and I won't spend too much time on this as it is essentially bogus, there is that look you get from the self-proclaimed experts that says, 'if you aren't clipped in, you're a lightweight; no matter how well you ride' (obviously bogus, like I said).
I recently acquired a pair of Wellgo B67's; thin profile, wide launch-pad platforms with pins. I think I get at least 80% of the power I get with clipless on the straight aways and more 'oomph' (torque) when it really counts, like in the crux of rounding a steep uphill switchback. With the platforms I've even climbed some stuff I couldn't make before, which really surprised me! Except for those (at least) half-day rides on mostly smooth trail and fire roads, I think I'll ride these platforms as my standard pedal. And I can stop when I want to for a hike, which I sometimes enjoy as much as my bike ; )
So, it seems I've gone full circle: bear-traps > clipless > platforms and it's working out great. And I, in contrast to the prevailing 'wisdom', think that for my favorite type of riding (steep, winding hilly trails) I'm a better rider on the platforms. Your experiences?