We can get a good idea how the different ST or LT or P tire brands are doing by surfing different trailer websites (rv and non rv) and see for ourselves which brands or tire type are handing out the most problems. On some non rv websites many trailer owners actually wear the tire out before the 3-5 years time out. Some non rv trailer owners can wear out 2 sets of LT tires a year at 40k-60k miles per set.
2010 and 2012 era was the time when 16" load G ST Sailun and ST Providers 15"/16" E/D/C load range started showing up on commercial trailers. Some of the many ST tire mfg had to to play catch up and come up with a better tire. Other ST tire mfg still still standing at the gate.