I think its very cool that we have so many choices on different shaft materials.....
There just ain't nothing sweeter than a beautifully balanced hand crafted set of woodies. but they take a lot of TLC to build a matched set.
Aluminum will hands down give you the best consistency in spine tolerances & weight, but they can bend easily, and long term durability is worse than woodies.... Once they are bent, you'll rarely straighten them and have them fly the same.
Carbon shafts come in a wide range of tolerances and grades. In order to get a finely tuned matched set, requires almost as much effort as tuning woodies depending on the shafts. But they rule supreme in durability.... and...they are either dead straight, or broken.
I was really surprised at the difference in spine readings in carbon shafts just rotating the shaft.... the manufacture and shaft grades can make a huge difference for discriminating archers who are seeking a truly matched set of arrows.....
The skill level of the archer has a big part in being able to fine tune arrows & be able to see the difference. With the average archer, ignorance is bliss and it just don't matter how closely their arrows are matched up as long as they are hitting their spot enough to be comfortable. For some guys its a pie plate at 15 yards. For others its a silver dollar at 25-30 yards..... That kind of shooting requires fine tuned arrow shafts regardless of the shaft material.