It wasn't observed exactly to the rule 20 yrs ago. Theres always been a bit of inconsistancy with observing and always will be.
In my area virtually all trials are observed to no stop or stop for a 1 properly observed. Seems to be a thing down south to ignore the rules that the ACU clubs are supposed to use.
One club in our area always has a very good turnout of youths and they run full no stop.
To say which is more skillfull, no stop or hopping, is impossible. Both are skillfull in their own right.
For kids it is difficult to learn to ride no stop in their back garden but trick riding can be done there so I think trick riding will be prefered by a lot of young riders.
I think both types of trial should continue side by side. Just go to the trials that suit you.
Seems that thats already happening with the British championship. Riders don't like the way it is now so entries are slipping to unsustainable levels. Not sure what it is that isn't working, too many hard sections, time limit in the sections too tight or could it be the observing rules
For me I think stop for a 1 observed correctly is the best compromise to suit both camps.