I know more people personally that have had a SoN failure than have had an SP failure. You hear about the failures, not the non-failures.

I paid the extra for a TA hub, and then they immediately came out with a different TA standard. So be careful with your choices, you might change the course of history like I did. Now that you can get SP from QBP, I get a discount on them from my lbs. My last bike was going to get a SoN, but that was far too much. Definitely TA for that bike.