And to think, growing up, we had to suffer with going out three hours straight (no break) with a real 3-5 minute presentation AND literature (this is in the 60s and 70s). All sorts of open note taking on the street (and I agree, how crazy did that look to the householder watching from behind the living room curtain) and keeping your territory straight so when you turned it in you could tell the territory brother it had been thoroughly worked. By the time I was in my 30s it had been diluted to driving around looking busy.... and now, most areas not really getting worked at all, and that is normal.
So, the trend is actually going downward, steadily. I can't see any real preaching happening in another 20 years or so.