My two cents...
I think the R7 will have an AF system equal to or better than the R3. If I remember correctly, the 7DII had essentially the same AF system as the same-generation 1DX. I would anticipate the R7 possibly even being a test run for what the R1 AF system will bring.
Regarding the M series and it's possible demise, I think the fact that Canon will release APS-C bodies with the RF mount makes it more likely (but not guaranteed) that the M series will phase out. I guess it'll depend on how small of lenses and bodies Canon can create with the RF mount. Size and weight are the biggest differentiators for the M series, so only comparable size and weight in RF will be a threat to M. APS-C on RF is the first hurdle. Let's see where overall size and weight end up...
I think the R7 will have an AF system equal to or better than the R3. If I remember correctly, the 7DII had essentially the same AF system as the same-generation 1DX. I would anticipate the R7 possibly even being a test run for what the R1 AF system will bring.
Regarding the M series and it's possible demise, I think the fact that Canon will release APS-C bodies with the RF mount makes it more likely (but not guaranteed) that the M series will phase out. I guess it'll depend on how small of lenses and bodies Canon can create with the RF mount. Size and weight are the biggest differentiators for the M series, so only comparable size and weight in RF will be a threat to M. APS-C on RF is the first hurdle. Let's see where overall size and weight end up...
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