I have a Canon ImageClass MF733CDW at home that's maybe six years old and it'll print with off brand toner just fine. I've run nothing but generic/counterfeit toner cartridges in it since I ran out the ones it came with. It did bitch about it on its little screen the first time I installed one, but you can turn that nag off in the options and it never prompted me again.
At work we have one (1) Canon LBP632C that's probably around a year old, our sole color printer in the building, and it too has no problem with generic toner cartridges. That one's just a printer, not a multifunction machine.
The only gripe I have with the generic cartridges is that the toner level reporting is not very accurate, but I've never found it to be very accurate to begin with so I'm not sure I'm missing out on much.