Strange to call it an "Old" model when there is not, as yet, a "new" model.
It would be interesting if Canon could get much more light through the current 22mm lens. F1.8 could be a target but to what end? A largerens/barrel and the current form lost? At what price.? The attraction of the current killer price of the kit might be lost chasing a dragon of wider aperture/IQ
In the case of an M3 release, there has been a short "wish list" earlier in the thread. I certainly have listed mine but whilst dreaming is one thing the bottom line is how nuch better can it realistically get?
The 22mm pancake is a fantastic lens for the price and at the £55-80 mark on EBay even more so.
To take an analagous viewpoint, I have an original EF 50mm f/1.8 mk 1 and a newer plastic mk2. For 98% of shots when I do comparisons on my DSLR I cannot see any difference in image results. Yet the mk 1 on my EOS 3 film camera produces deeper colours than the mk 2 on the same camera on the same roll of film??
So if/when a "new" 22mm M lens arrives, it is going to have to be one hell of a lens to be worth buying over the current one. Then at what price?
As I have said earlier in the thread, it is entirely possible that s cogent M3 with new M lenses added to the range could see me selling off my DSLR kit.
Now with my knee damage I am stuffed getting out and about so my kit is clean as a new pin :-(
Steve