I guess they go the same way now like they did with the EF system: the will probably come up with a crop RF mount camera. Economically it would make much more sense than keeping two incompatible systems alive, in such a tight market now.
I have no allusions about anything new coming to the M line. All I would ask for at this point is a statement about what their plans are going forward. How long will they continue manufacturing the current products? Do they see an “M-mount type” camera coming to the RF line down the road? Not just APS-C; but “value-oriented” APS-C. Or value-oriented FF for that matter. Of all the crazy things people demand of Canon, I feel like a paragraph, even a tweet, providing some guidance is not that unreasonable.