I was also curious to know the wind-on failure. See the post I just sent on another topic, I think the 11/27 reports post.
All my rods that have the large roller guides are 100% wind-on equipped now. I have developed my style in this direction. If you do them right, they will not fail, in my opinion.
So once you have mentally chosen whether it is OK to have any swivels anywhere close to the bait, that will determine whether you are a wind-on candidate or a traditional Marlin fisherman using the long hand leader approach. But the wind-on does not stop you from hand leadering a fish up to that 6 ft. mark, so I think you can go both ways with wind-ons.
Once you go wind-on, you immediately change gears and now your baited leaders are only 5-8 ft. long compared to 12-20 ft. from the "swivel interconnect" to the bait. For me the snap swivel is the way to go, but I have seen numerous anglers that will not give up the minimalist double ringed swivels and two crimps. I am not fishing for big money so I just find it extremely more convenient to snap on a fresh bait rather than having to make a new crimp with my ringed swivel. Yeah, I still have a couple in my tackle box, but I haven't used them in years.
Besides the Safety aspect of using wind-ons, you may also gain an extra hand. The last time I was on a fish, being the reel man, we only had two people on the boat. With the wind-on I was able to reel the line up close. We put a small flying gaff in place, I grabbed the bill with rod still attached to me and Bob grabbed the gaff line and tail end to get the swordfish into the boat. The entire situation would have likely been reversed if we had a 15 ft. leader. We would have needed a third person to be gaff man if we had this setup. Or else I would have needed to disconnect the rod, place it in a rod holder and switch positions to be the person pulling the gaff and/or tail end of this fish into the boat.
So there are many choices on how you do things, many of which are practiced by professional anglers. Whether it is the right way or the wrong way depends on who you hang with, but both are considered correct by someone you respect. RT
P. S. Robbie - Technology is always at the fore-front of the tried-and-proven concepts we utilize. Sometimes the technology completely revolutionizes the way we go about our business: sometimes it is merely a fad or a no-advance. Since I am RT, by default, you can only guess where that puts me in the line-up. And it usually takes some time for people to adjust to a new-fangled method, even if it seems compelling enough to switch right-away. Alohas