After growing outdoors for more than 25 years without pruning, last year I did apical pruning to all of my plants to see how it goes.
The result..... I have decided to never apical prune ever again due to many of the plants splitting at the apical pruning site because of some heavy rain and strong winds. I lost a considerable amount of branches, and all of them the main colas, which reduced yields tremendously. I have never had this happen with unprunned plants. I will stick with not pruning and only using low stress training for the next 25 years, as I consider my apical pruning experimental year as a failure that could have been avoided. You could say it was bad luck due to the heavy rain and high winds, but freak late summer storms occur regularly where I live. If I were ever to do apical pruning again, growing inside a cage or with stakes would be my safeguard against storms, but I see this as unneccessary, if I grow unprunned plants and just use some low stress training instead, there is no need for cages. Although on the plants that survived without damage, the yield in the branches was more, but I don't think the yields were more than from what I normally get from an unprunned plant of the same strain in previous years, therefore I see no real advantages to apical pruning.