I do consider going 1x9 from time to time but I love not thinking about shifting, not adjusting derailleurs, not dropping my chain, and not worrying about smashing a derailleur on a rock or stump. If I'm not climbing, I feel like I'm more likely to be using the brakes than pedaling anyway so spinning out really isn't that big of an issue. It happens on some of the CR connectors, getting into QR, and on the straightaway where the much discussed new TTF is at QR. Other than that it's basically a non-issue. I see the advantages of both but for now I like the challenge and simplicity of single speed.