This discussion was still going on in the 1970s. Nowadays this is no longer the case. Anyway, at the time this could ruin many party.
And as stated in the June 1972 edition of Easyriders magazine, both systems must in any case be properly adjusted.
Below is the article in question that discussed the correct adjustment of drum brakes. For those who still have access to an chopper/motorbike with drum brake[s] can learn something from this, if they didn’t already know this.