I always like to shoot JPEG only with minor adjustment maybe on my iPhone.
I started with M240 CMOS - sold it later because I feel very pressured to use it, demanding camera especially the metering system. I return back to Leica, now M9P, because I now enjoy slow photo-taking experience, I enjoy manual focusing, I enjoy tricky metering but most importantly, I enjoy CCD and once you know M9 biggest problem is AWB, this M9 gives you incredible JPEG image that no other Japanese camera can do. I sometimes wonder everyone talks about how good Leica lens is, they are good but I think Leica also has a way with their sensor.
So, although I have not used M10 and I heard M10 JPEG is not good, I don't think M10 JPEG would be an issue, just go ahead and shoot JPEG! Enjoy the Leica magic.