It may be worth pointing out that during the days of the four tackle rule, prior to the change to six, and to some degree early days of six tackles rule you could kick for touch anywhere provided it - the ball bounced first and went
Into touch. This gave the attacking side " loose head " ie, open side prop & hooker had the best sight of the ball placed in the scrum when scrums were contested + a very good attacking side could retain possession this build pressure, the value of having the best ball kicker out of hand ensured a side dictated play. Wakey had one of the best ever - Don Fox, Don murdered Hudersfield in the headingly re-play 1968.
Hence when Don kicked, sides panicked, at Wembley Leeds gave away the first try with Atkinson pulling the ball back away from touch to prevent a scrum on the 25, however hurst was so quick following up he kicked ahead & scored.
On the + side a side could constantly work up the field of play, more scrums, but a scrum was always in line where
The ball went in, even if it was 1ft of the try line, hence push overs were possible.
On the negative, a side would - could kick 1m ahead to ensure loose head & put in at any point in play.
So if the new rule of 20/40 was the 1st kick, played tap was taken with a side laying deep with a further kick taken 20m back for a 40/20 then an attack taking a tap on the 20 could pay dividends if successful kicks were achieved ?
Interesting times I suppose ?????