What about windage and longevity?
I've been using 1/8" Robline, and its actually a bit thinner than that, more like 3/32". I bought some Amsteel that was supposed to be 1/8" and its really thick. Too thick to get through the trap handle without modification once spliced. You could use 1/16", but I'd keep an eye on them for wear. I had the same set on the FXone for 3 years, the only reason I replaced them was that I wanted to move them to a shackle and had to cut them off.
They're easy to make yourself. I thought splicing was a black art, turns out its super simple. They also don't kink, which drives me bonkers with wire. I tie mine off to the base of the mast with a bungee on the FXone, then just use ball ties to keep them from flying around. I wouldn't do that with wire as I don't want to scratch up my mast. Assuming your handles and thimbles are in good shape, you can re-use them when making new lines as well. If you make your own wire trap lines I guess you could do the same, bit I have no swaging tools.
I do want to try out rope for the shrouds as well. I currently strip the shrouds/forestay off the mast when trailering.