While rings don't wear out as easily SRAM ones in the 10 and 11 speed generation tend to be a bit softer than one would expect. Visual inspection can usually lead me to an indication that there's "some" wear there. If there is and I can pick up "gear mesh" or small harmonics while running it with a new chain then I usually swap the ring. Everything tightens up and it sounds great and it's then you realize how worn it really was. Usually a semi-inexpensive fix.