My MTB shoes are very comfortable for walking and have great traction for stops. They provide a stiff sole for riding.
I don't even notice them when driving or running errands on the way home from rides. Touring with significant time off-bike to visit local attractions, shopping, and meal stops.
I wear them on my new hardwood, tile, and carpet flooring. They do make a little crunchy noise on brushed concrete sidewalks and roads.
My double-sided SPD MTB pedals are simple to clip in/out. No need to flip the pedals to get the correct side.
I love being clipped in when pulling up on pedals or standing to climb. I've fallen off slick rattrap pedals too many times.
My bad knee also likes the fixed position of the clip/cleat.
On campus pedals (platform side) I never could get my foot in the "right" position and it was harder to clip in on the SPD side.