I've been walking about 10kms per day for decades now without wearing any shoes at all. No detrimental effects so far. But then I'm a featherweight, which might

I've been walking about 10kms per day for decades now without wearing any shoes at all. No detrimental effects so far. But then I'm a featherweight, which might help. Anyway: walking is absolutely essential to me. I do most of my work outside, walking and thinking.