I never understood the use of a tiny pancake lens on a big DSLR camera. If one wants to travel light and incognito ala for street photos, turning to 22mm on a M6ii would be much more ideal.
There was a time (late 2012) when 6D+40mm was, by a large margin, the best option to have a reasonably sized FF DSLR combo with all the last techs available (in fact, the smallest and lightest at the time of 40mm launch). At that time, M system was far from being the success it became about 5-6 years later, and far from giving the results that gave even M5 and M6, for instance. Whatsoever, 6D is still better and more reliable for intensive usage and overall image quality than an EOS M50 of 2018.
Though, by now, I agree the 40mm may be much less interesting... and that's probably one of the reason why Canon has stopped producing it, some other reasons being probably :
- the fact Canon is leaving EF mount production (something that was announced back in 2020, I think)
- the fact that there are so many 40mms that were sold and are probably still working fine,
- the second hand market is just enough to find one + not enough people are interested in buying one new.
Only around my city, there is always 2 or 3 40mms to sell at a reasonable price since at least 2020 (including mine
).
Anyway, to add a very personal point of view, my own replacement for the 6D+40mm combo would never be M6II+22mm pancake (even if it's a pretty good one for its usage). It would be Nikon Z6+40mm F/2 which btw is even better than 6D+40 was... (at least to my sense, just hoping it will be as durable).