I like and routinely use 8’ split reins. When we go to MT in the summer, my favorite reins go with me
I like heavier reins, no spagetti reins for me. I just like the weight- less static on the line between me and the horse. easily crossed over their neck and held w/ one hand, or both on one side. My best set is 1" wide, then tapered in the middle, then weighted on the ends, which makes one helluva popper. All of my split reins are tied on the bits with thin pieces of leather for safety-I can’t recall the formal name for them, sorry- it would break if a horse stepped on his rein.
I also like a long continuous loop rein, thicker nylon cord, on slobber straps for safety (breakage if stepped on is important to me). I made my own as nothing I could buy was long enough for my tastes, I want to let them drink w/o sprawling on their necks to let them drop their heads. Again, easy to hold anyway I want to- english, western, or convenient.
And I can’t say as I’ve fallen off any of the horses we currently own or any I usually ride, so I don’t really factor in splat factor when choosing reins. Now I recall I came off a borrowed Arabian in 06, she spun in surprise when a cow popped out of the woods, and I was too lazy to drop my wadded up slicker to grab leather. I got dizzy before she stopped, so I plopped right off. Never did drop that damn slicker, either. LOL