Throughout the years I've been on this board, most of us can't agree on a good record, mic, pre-amp, cable, etc. However, the m10 is still held up as a good recorder. Not perfect, but after years since it's been released, we still seem to like it.
It's hard to say what prosumer lines of Sony, roland and tascam will do to stay relevant in face of everyone using iphones to record with. I simply like different devices for different things, so I hope there will be an m20 soon.