Canon has now reached NX300 (not yet NX500)

Somewhere, years ago, i read that NX1 was developed with Canon 5D in mind (the so called Classic or Mark I ), the idea was to produce a crop sensor that could compete with that FF camera. And they did it. MarkII has a small edge in iso but NX1 has a small edge in DR. Then thay push all the specs and feature as far they could go and added adequate lenses . They push on everything but marketing, in fact.

If you look at ISO performance, since NX1 there is no crop sensor with a noticeable difference in better. I think that Samsung was very close to a limit of the APSC sensor (unless you introduce something new in the receipe).

We, here, have discussed many times "where to go from NX", EOS M was my long term option but, as many, i did not expect that the 2017 would be year of the surpass.

M6 is a product for the EOS M audience, not for the NX audience. Not yet. Do not expect to push features to gain a market that they already own.

But if you ask me, the real discussion here is the lens development. Canon will (luckyly) come out with a new EOSM lens every year or two (and that is already good, they are pretty busy, also upgrading lenses for the other 2 system etc etc). It will take time to have a complete lineup. Yes, you can adapt EF and EFS lenses, but it is not the same. A mirrorless system needs its own lenses to work at its best. And i dont think that the equivalent of the 16-50 2.0-2.8 is coming any soon.