One of the few things that has disappointed me about Canon in recent years is their half-hearted entry into mirrorless. They probably have business reasons for not building out the EOS-M system too much, which I understand.
But they introduced the SL1, ostensibly as a "mirrorless fighter", but I'm confused as to why they wouldn't have introduced at least 1 more pancake lens that could be coupled with this camera. As many have pointed out large lenses kind of defeats the purpose of this camera, and the 40mm I feel is a bit too tight to be a true walkaround.
I'm wondering if it would be that difficult for Canon to develop something like an EF-S pancake prime, say a 24mm 2.8 type lens. I'm not too familiar with lens technology, but seems like limiting this to an EF-S lens and having a relatively slower aperture would make it possible for the lens to be really small/light, and relatively cheap? Or is it a lot harder to develop pancakes at wider focal lengths?

I'd love a 400 2.8 pancake, come on Canon!
