You might be surprised at how good the in-camera JPG images can be if you actually turn on all the things that would make them good....like vignetting correction, noise reduction, in-camera sharpening set reasonably high, and auto tone curve selected, and Active D-lighting enabled. I shot some events in the summer of 2014 using the D3x and the camera set to RAW + JPEG, at high ISO values, and with the aforementioned settings all enabled. I was utterly shocked at how well the JPEG images came out. The SOOC JPEG images looked in most cases, almost exactly how my finished Lightroom edits looked in terms of tone curve, brightness, and overall "look", and the noise reduction was really good. That camera is not super-awesome at ISO 1,250 and 1,600, but that's where I was stuck most of the time, and I was pretty shocked, really, at how the SOOC images the camera processed held the right mix of detail as related to noise reduction.
I really think that, for many people who are not file-processing experts, that the in-camera noise reduction the camera manufacturers design for each camera might actually produce results that are better than what non-experts can produce. For some events, like these low-light, indoor events where there are 400, to 500 frames shot, the SOOC JPEG images shot with the camera actually set up properly and with some thought, can save a substantial amount of effort. it seems like there are a lot of people who want to act as if it's still 2004, and we're shooting cameras that have absolutely zero technology built into them by huge teams of engineers and imaging specialists.