In reply to Si dH:
I'm not suggesting a 100% return to old ways of doing things.
I'm suggesting learning from them.
Yes pads are good for ground erosion but useless for cleaning feet. The combination of a pad & carpet is what I use.
Just slinging a pad on the ground & not bothering to clean feet, other than, sometimes, a token swipe on a muddy pad
(which is what I now see 99% of the time) means feet are usually, now, much dirtier than when the normal approach was to stand
on a mat while obsessively cleaning shoes.
Yes, the hold slapping cloth was also , in the past, the same cloth that contained resin, that doesn't invalidate the approach of slapping loose sand from holds.
Certainly a harsh brush shouldn't be used but , however soft the brush, when a hold is brushed again and again and again ,possibly hundreds of times a day. the cumulatibve effect
must be to accelerate hold wear.
As PeteGunn says above, the rate of damage in Bleau has accelerated drastically in the relatively recent past and we need to be looking at why!