Exactly, who says that someone who wants a small light system does not want some more "advanced" lenses? After all, if you look at m4/3, they have a much larger lens line-up than EOS-M, and I presume people buy all these lenses. Or maybe Canon wants me to switch to m4/3 or Fuji?Just curious what is the use-case that M lenses do not cover the need? If I'm correct, the existing M lenses cover the range of 11 to 200mm (17-320mm equivalent) that is quite useful for everyday use from wide to telephoto. There are a few primes (22, 28 and 32mm) and macro (28mm). I know there is no tilt-shift or longer telephoto lenses, but those are generally reserved for more pro use-cases which are covered by EF/RF series anyway. What is the limiting factor here?
Anyway, specifically - at present with EF-S, I have 10-250 covered with kit lenses, so a bit more reach, and more then 5 degrees wider angle of view at the UWA end. Yes, maybe Canon will update the lenses at some point to increase that, but I don't count on it.
The macro, EF-S is a 60mm lens, giving a good working distance of 9cm. If I need more working distance, I could get an EF 100mm macro. The EOS-M 28mm macro gives me only a ridiculous 18mm working distance at 1:1. Ok, it's a fun little lens, but I'd put it in the gadget category, when one wants to make "wide angle" macros. Well, maybe Canon will release a longer macro for EOS-M in the future, but I don't count on it.
Low and behold, I do have an EF 100-400. That will never happen on EOS-M. In fact, many people use a Canon 80D or 7D with tele lenses. Ok, a FF Canon 5DS would give you similar cropping power (comparable pixel density as e.g. an 80D), but why should I pay 3 times just for that?
And then the EF 50mm f1.8, (equivalent to an FF 85 portrait lens) for the occasional portrait. - Nothing in EOS-M. Ok, Canon just came out with the 32, but that is equivalent to a 50mm lens on FF. Maybe Canon comes out with a 50mm at some point. I doubt it. Canon will assume that Pro photographers use FF for portrait. But who knows, maybe one does not need a portrait lens in the future anymore, all the hokeh is done by software....
So, while indeed most people never go beyond kit, if one does start to go beyond kit, the M - line is rather limiting, too limiting I think, since it has to compete with m4/3 etc.