Its not edginess.Its the learning of the many ways you can move a canoe. Used to be that every kid in an Ontario camp knew the basic skills in FreeStyle fifty years before that unfortunate name was plastered on quietwater canoeing.
There is nothing edgy about it aside from boat heel if desired. The big change came in the 70's in boat size as the paddling population entered the "Me Me Me" "I want my personal boat" phase and became less interested in canoeing as transport and more of that as canoe for sport. Boats shrank, paddle widths grew.
These days there is an interest in melding the "sport" and the practical "transport". I am jealous..some are now gathering paddling miles in Florida. And I am on the computer duh
BTW I started solo paddling in a plastic kayak... Soon I saw the light.. I needed a canoe or six and one real sea kayak